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North America Immigration Law Group (Chen Immigration Law Associates) is a U.S. immigration law firm dedicated to representing corporations, research institutions, and individuals from all 50 U.S. states regarding I-140 immigration petitions. We specialize in employment-based immigration petition and have a proven record of high success rate for the categories of:

We keep close track of the latest immigration trends and regulations of USCIS (U.S. Citizenship and Immigration Services), decisions of AAO (Administrative Appeal Office) and judicial review opinions. The massive collected material contributes to the winning strategies for our clients' cases.

Approval of each case is the goal of our law firm. The key to our success is how we present supporting evidence and the high-quality petition letters based on systematic knowledge and comprehensive database developed by our firm. To provide the best immigration service, North America Immigration Law Group only hires attorneys with J.D. degrees from top law schools.

We have one hundred percent confidence in our capability to successfully represent our clients, and we are the only U.S. immigration law firm with refund policy on I-140 petitions. This is not an empty guarantee but specifically laid out in the attorney-client contract and is binding on our law firm.

We are pleased to announce that North America Immigration Law Group has so far received over 6,000 EB-1A, EB-1B and EB-2 NIW I-140 approval notices. In 2015 and 2016, the approval rate is 97.9% for cases using our Approval or Refund® (money back guarantee) service and 96.9% for all cases.

Our approval rate is 99.6% for NIW petitions using our "Approval or Refund®" (money back guarantee) service and the overall approval rate for all NIW cases is 99.2%.

In terms of EB1A petitions, the approval rate is 96% for cases entitled to our "Approval or Refund®" (money back guarantee) service and the overall approval rate for all EB1A cases is 94.3%.

As one of the leading U.S. immigration law firms providing the most comprehensive services focusing on EB-1/NIW petitions, we are proud to maintain our high approval rates with a large volume of approved cases.

* The number of EB1B approvals is under-estimated because we calculated our approval rates based on the approval notices we received. Some EB-1B petitioning employers did not submit a G-28 so only the employers received the approval notices.

** One denied case was not originally filed by our firm. We took the case after an RFE (Request for Evidence) was issued and the case was denied after the RFE response.

*** Among 125 EB-1A denials, 71 were processed in NSC (Nebraska Service Center) and 54 were processed in TSC (Texas Service Center). The majority of the EB-1A denials processed in NSC were issued by officers who requested thousands of citations for EB-1A approval.

In 2015-2016, our approval rate for O1A I-129 cases is 100%.

Note: These statistics are based on the final adjudication received in the specified year. Some of the cases were approved after appeal, motions, or re-filing.

Client Testimonial

  • Postdoctoral scholar

    I'd like to thank Chen Immigration and attorneys for the great job they did on my I-140 application for NIW. They put together a compelling petition letter with appropriate exhibitions which resulted in my I-140 approval only in 72 days at Nebraska Service Center (the average wait time at this center is more than 10 months now). The team at this firm are experts and experienced. They meticulously prepare all the required documents and effectively communicate with the client. They deliver on time & with the highest quality. I have recommended them to my friends who would like to apply for NIW or EB1A. Chen group knows what they are doing and they are the best, go with them!
  • Chemical Engineer

    I worked with Chen group for my I-140 through EB2-NIW category. I only can say that they were fabulous. They certainly know their stuff and I'm so glad that I got to work with the best. I already recommended them to many of my friends
  • Structural Engineer

    My I-140 (NIW) application was recently approved after over a year. I would like to give special thanks to Chen Immigration Group for their professional service and support during this process. They are very knowledgeable, helpful and efficient in responding to all questions and concerns. I’m so grateful for all their efforts and I'd definitely recommend the team to whoever seeking immigration filing.
  • Scientist

    I received a NOID (Notice of Intent to Deny) after having filed my petition with premium processing. It was Chen Immigration group who helped me to get it approved. I am so happy to receive the Approval notice today. Without Chen Team’s professional reply, I would have been denied. I really appreciate their professional service and would like to share my Success story. I was referred by two colleagues who strongly recommended Chen Immigration group. I have never regretted since I started working with them. They are so professional, carefully reviewing each document, patiently explaining every single question I asked, drafting documents before deadline. After I received the NOID, I was so frustrated. They assigned an immigration attorney who has a lot of experience in NOID on my case and it worked. Thank you, Chen Immigration group! Special thanks to [Chen Immigration Attorney]!
  • University of Maryland School of Medicine
    Postdoctoral Fellow

    This is My Success Story of NIW Approval. I am working as a Postdoctoral Fellow in the University of Maryland. I can write pages explaining why the Chen Immigration is the Leader in the Immigration Category.
     Fastest processing of documents and responding emails
     Affordable Fee Structure along with refund option if case is denied
     Exceptional preparation of Drafting petition letters and documents
     Great Narration or highlighting the significance of your accomplishments
     Never missed the timeline or deadline
     Above all the constant support until the approval.
    They are like a Guardian angel for me and they made my big dream come true. Can’t ask for better and I was over the moon when my petition got approved. Wish the Chen Immigration would continue doing their best service. God Bless them.
  • Johns Hopkins University School of Medicine
    Research Scientist

    I'd start by saying that I give my highest recommendation to Chen Immigration Law Associates for I-140 and I485 applications. They have impeccable experience combined with structured and organized pipeline for the whole process. All the attorneys and staff that I have interacted with at their firm are very thorough and reliable. They do an OUTSTANDING job with the personalized petition letters. They have answered all my questions in a timely manner. With that being said, I’d like to add that they follow strict timelines. Be sure to have realistic expectations. To begin with I-140 and I-485 applications can be daunting and overwhelming, however, if you follow Chen Immigration’s instruction packet for each form, it gets insanely easy. They have broken down and elaborated every single point in their manual. Lastly, I would say that they are totally worth every penny that you pay for their service.
  • Associate Professor

    I would like to give my special thanks to the North America Immigration law group for all the efforts they put to get my I-140 NIW application approved. I took almost 5.5 months from the submission date to the approval date. This group is professional, punctual, accurate, responsible and accountable. It was my pleasure working with this firm, and I’ve learned many things from them.
  • Yale University
    Postdoctoral Associate

    I am very happy to hear that news that my I-140 NIW has been approved. It is great news for my family too. I never think that I could apply as a primary applicant as because I was unemployed during my case filing. My family and I are very grateful to Chen group. I highly appreciate Chen attorney team efforts on my case. I sure recommend Chen attorney to my friends.
  • I thank the Chen Team for all the help throughout the process. I strongly recommend them to everyone as:
    They reply emails maximum in two business days, and their responses are always thorough and very helpful.
    They are very professional and provide good guidance.
    They draft the recommendation letters and the petition letter for you.
    They provide a refund option in case a case is denied.
    They have a nice online system where you have all your docs, and message board etc.
    They provide a free online kit (for their clients) for i485 application which is extremely well prepared.
  • Chen Immigration group

    My EB1A petition was approved a week ago. I have been introduced to Chen group by one of my friends. They are really meticulous and precise in reviewing all my documents. They are completely adherent to their timelines. They answered my messages within maximum 2 business days. They have also told me that they would give me a refund if my case in denied. I highly recommend Chen group to anyone who wants to apply for green card. They make the process very smooth and easy to follow for all the applicants.
  • دوستان عزیز سلام
    من دیروز پذیرفته شد EB1A پرونده
    من از داخل ایران اقدام کردم و این گروه مهاجرتی را یکی از دوستانم در آمریکا به من معرفی کرد. باید تشکر صمیمانه داشته باشم از این گروه بواسطه تمام تلاشها و دقتهایشان در تمام مراحل کار. با حوصله و دقیق تمام سوالات را جواب داده و در تمام مراحل از همان ابتدا شما را راهنمایی کرده و در جریان کارها قرار می دهند. به جرات می توان گفت از خود من نسبت به کارها دقیق تر و پیگیر تر بودند. توصیه نامه ها به دقت توسط آنها نوشته شده که بسیار راهگشا بود. باید اضافه کنم در ابتدا بدون هیچ هزینه ای رزومه شما را بررسی کرده و نسبت به مورد شما اظهار نظر واقعبینانه انجام خواهند داد. در صورتی که شانس خوبی داشته باشید به شما خواهند گفت و مورد شما را گارانتی خواهند کرد یعنی در صورت عدم موفقیت حق الزحمه وکالت را عودت خواهند داد. این گروه در کار خود بسیار حرفه ای عمل کرده و من این گروه را به تمامی دوستانی که بدون استرس قصد اقدام برای گرین کارد را دارند قویا توصیه می نمایم.
  • An associate prof. in University
    The Chen Immigration group was suggested me by one of my friend.
    My EB1A petition was approved yesterday; the decision came within 12 business days after up gradation to premium processing. I am please to thank the Chen Immigration group for their amazing efforts and helps in succeeding their clients. They communicated with me very closely all through the online system without any difficulty at every step from the beginning. They answered my questions during whole process with careful and fast. I really thank the draft of recommendation letters and petition letter you prepare for me. When I read the recommendation drafts it seems that they know my research field better than me. It is no doubt that they have got an extremely strategic way of working with a user friendly online system.
    The whole process was very easy, straightforward and successful. I highly recommend Chen Immigration Group for everyone who wants to apply for Green card without any stress. I have already recommended Chen immigration to my friends. Hope to hear their successful application very soon!
  • Scientist

    Wow what a victory by Chen Attorney. It is giving us immense pleasure to hear the news that our I-140 is approved. We received the approval in just 50 days without premium processing. We are very grateful to the attorney for the successful victory.
    We have excited lot to hear the news that our case is approved. Feeling very very happy about it. The attorney's predictions are come true today in my case. The way they work for the individual case is remarkable and flawless. Working with Chen attorney is like walking on the flower road and we can sleep with no tensions about our case approval. Their professional attitude and timely replies are awesome as well. I definitely recommend the attorney for suitable persons.
  • University of Mississippi
    Research and Development Biologist/ Graduate Student

    Chen Immigration & Attorneys are extremely professional and efficient group. My EB-1A I-140 get approved in 10 days as my case was filed in the premium processing. I signed the contract with Chen immigration groups in January 2017 and I got the approval in four and a half month. Initially, I was not sure that my case is strong enough or not. But When I saw my petition letter, I got a confidence that I have a good chance of approval. I have not got my Ph.D. and I have less than 120 citations when my case was filed. They are open for your suggestions in petition letter preparation. They reply your all questions very quickly. They have very good knowledge and experience in immigration matter that is why they have the excellent success rate. I definitely recommend them for any green card and immigration-related matter.
  • University of Mississippi
    Senior R and D Biologist

    Chen Immigration & Attorneys are extremely professional and efficient group. My EB-1A I-140 get approved in 10 days as my case was filed in the premium processing. I signed the contract with Chen immigration groups in January 2017 and I got the approval in four and a half month. Initially, I was not sure that my case is strong enough or not. But When I saw my petition letter, I got a confidence that I have a good chance of approval. I have not got my Ph.D. and I have less than 120 citations when my case was filed. They are open for your suggestions in petition letter preparation. They reply your all questions very quickly. They have very good knowledge and experience in immigration matter that is why they have the excellent success rate. I definitely recommend them for any green card and immigration-related matter.
  • Post Doctoral Research Associate

    It was an absolute pleasure working with the team of Chen Immigration & Attorneys. They are extremely professional and efficient. They are also very patient and flexible as well as open to suggestions that you may have for the petition letter. Since everything is online, it is very easy to communicate and work with them. They are very knowledgeable about immigration matters and can figure out your strengths and weaknesses very well. This helps in making the application strong. They successfully petitioned my I-140 EB1 petition and I would highly recommend them for any immigration related matter.
  • Post-Doctoral research associate

    I enjoyed working with Chen Immigration & Attorneys. They are a professional group, every thing is systematic and on time. If you are looking for a flawless service, i recommend this group for sure.
  • My NIW, I-140 was approved a few days ago. I would like to express my gratitude to Chen Immigration & Attorneys and all of the team members. Chen team provided me excellent and wonderful service for my NIW I-140 application, and I am very satisfied with it! I would strongly recommend it to any of my friends who has the plan to file his or her NIW I-140 application!
  • PhD Student


    My I-140 was approved after 115 days. Chen immigration team is very professional and helpful. They do their best to make an application strong. I believe their effort is unique and I would strongly recommend them to others. I would like to have their assistance to file I-485 my spouse and me. I had a wonderful experience working with you!
  • Tulane University SOM
    Associate Professor


    It gives me great pleasure to recommend Attorney Chen without any reservations. They have been extremely professional and I am not surprised that they have such excellent results. I would like to inform that my EB1A I-140 has been approved. Thanks to meticulous work done by the group. All my questions were answered in timely manner and have kept me updated at every stage of the process. I am also utilizing their services for my I-485 application.

    Thank you Attorney Chen once again for your fabulous work.

Success Stories: EB-1A Petition Approved (Despite RFE) for Postdoctoral Scholar from India in the Field of Molecular Biology

Thank you and Congratulations to you and your team for the hard work and working towards our case approval. Very happy to receive approval notice.

Approved in 11 days

State of Residence: South Carolina

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Success Stories: Iranian Associate Professor in the Field of Inorganic Chemistry with Approved NIW Will Undergo Immigrant Visa Processing in Turkey

Thank you very much for your precious help to me to receive this success.

Approved in 374 days

State of Residence: NA

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Success Stories: After More than a Year, a New-Jersey based Postdoctoral Research Associate Specializing in the Field of Theoretical Chemistry Obtained NIW Approval


Approved in 377 days

State of Residence: New Jersey

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Success Stories: Polymer Chemistry Expert from India with Approved EB-1A Petition Is Ready for the Final Step in the Green Card Process

Good evening. Thank you very much for filing I-140 to USCIS on my behalf and for your cooperation through out I-140 filing process. Your organization is very cooperative with clients. I never ever seen an organization like you.

Approved in 54 days

State of Residence: Georgia

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Success Stories: Approved NIW Petition for South Korean Bioengineering Expert with 22 Citations Allows Him to Start IVP

Thank you so much for all your help and really appreciated. I was a bit concerned because of the election. Thank you again for everything.

Approved in 104 days

State of Residence: NA

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Success Stories: EB-1A Petition Approved Within 10 days for a Chinese Postdoctoral Fellow in the field of Proteomics (With PP)

Thank you for the great information and help. I have passed your company information to my friends who needs help. Your service really save a lot of time and effort and we know the cost is worthy. Thank you again for the service.

Approved in 10 days

State of Residence: Maryland

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Success Stories: Specialty Hospital Sponsors the EB-1B Petition of an Indian Research Engineer Specializing in the Field of Biomedical Engineering

Thank you for all the support.

Approved in 9 days

State of Residence: Rhode Island

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Success Stories: Texas Service Center Approves EB-1A (Alien of Extraordinary Ability) Petition of a Chinese Associate Engineer Just 13 Days after Filing (With PP)

Wegreened attorneys delivered every deliverable on time! They have a very efficient and effective process. True professionals! I have recommended them to several friends.

Approved in 13 days

State of Residence: Oklahoma

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Success Stories: A Postdoctoral Research Associate with 120 Citations Received EB-1A Petition Approval 14 Days after Upgrading to Premium Processing

Thanks again for your hard work to make it happen!

Approved in 163 days

State of Residence: Minnesota

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Success Stories: In Just 5 days, Nebraska Service Center (NSC) Approved the EB-1A Petition of an Indian Pharmacogenomics Research Specialist

Thanks so much for all your help. You are the best

Approved in 5 days

State of Residence: Illinois

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Success Stories: After a Lengthy Battle, a Scientist Working in the Field of Chemical and Biological Engineering Finally Obtained NIW Petition Approval

Anyway, I do appreciate your company on this lengthy and tortuous journey.

Approved in 476 days

State of Residence: Maryland

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Success Stories: Senior Economic Analyst with Approved NIW Petition is Now Ready for Immigrant Visa Processing in Norway

Great News, thank you very much for your support all these months. This will be a great leap forward for my professional life, and it was you who made it possible.

Approved in 425 days

State of Residence: NA

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Success Stories: A California-based Ph.D. Candidate/Research Assistant from Iran Engaged in the Field of Electrical Engineering Receives NIW Approval

I will definitely post my positive experience with you and refer you to my friends.

Approved in 328 days

State of Residence: California

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Success Stories: EB-1A Petition Approved in 7 Days for Senior Scientist in California in the Field of Nanomaterials Science (PP Requested)

Today we noticed that our case was approved! We are very excited...

Approved in 7 days

State of Residence: California

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Success Stories: An Iranian Engineering Expert Receives EB-2 NIW (National Interest Waiver) Approval and Is Currently Undergoing Immigration Visa Processing

Thank you very much for all your support and consideration.

Approved in 331 days

State of Residence: NA

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