Yvonne Chak, MD
Obstetrics & Gynecology Physician · New York, NY
Yvonne Chak, MD is an obstetrics & gynecology physician with a practice address in New York, New York, and NPI 1063764108, issued on Oct 14, 2012. Check the license (New York 264749, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Yvonne Chak
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 264749 NY
Self-reported in NPPES; status is on the state search - Practice location
- 156 William St FL 7, New York, NY 10038
- Phone
- (646) 962-2620
- Enumerated
- Oct 14, 2012
- Record last updated
- Jun 27, 2023
- Fax
- (646) 962-5692
- Medicare enrollment
- Enrolled (PECOS I20160829000947); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 2008
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 3,174 in New York → Look up another NPI →
Also registered at 156 William St FL 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julia CronObstetrics & Gynecology Physician1235192766
- Talya Danzer, MS, CGCGenetic Counselor (M.S.)1457159410
- Matthew Deng, MDPediatrics Physician1952938672
- Cindy Do, MDPediatrics Physician1841934338
- Shao Fen Sherry Huang, M.D.Pediatrics Physician1528264397
- William Huang, M.D.Maternal & Fetal Medicine Physician1740341270
Verify Yvonne Chak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 264749Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
63 Medicare Part D claims for 25 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Estradiol25 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Weill Medical College OF CornellNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yvonne Chak among 3,174 obstetrics & gynecology physician records in New York
Yvonne Chak, MD is one of 3,174 obstetrics & gynecology physician records with a practice address in New York. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 73% of them.
- NPI issued2012 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2008 · median 2002 among the 1,870 with a school on file
- Record last updated2023 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in New York
There are 3,174 obstetrics & gynecology physician records in New York.
All 3,174 in New York → Every provider in New York → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Rachel Barr, M.D.New York, NY 100381992931307
- Julia CronNew York, NY 100381235192766
- Moushumi Datta-Thomas, MDNew York, NY 100381063612737
- Frida Fridman, MDNew York, NY 100381932405768
- Natalya Goltyapina, D.O.New York, NY 100381578711891
- Meredith Halpern, M.D.New York, NY 100381609831437
- Christina Kong, MDNew York, NY 100381932266905
- Szilvia Nagy, M.D.New York, NY 100381992098289
Common questions
What is Yvonne Chak, MD's NPI number?
Yvonne Chak, MD's National Provider Identifier (NPI) is 1063764108, issued on Oct 14, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Yvonne Chak, MD located?
The NPPES record lists a practice address at 156 William St FL 7, New York, NY, 10038. Phone: (646) 962-2620. Providers update this record themselves, so call before visiting.
How can I verify Yvonne Chak, MD's license?
NPPES lists New York license number 264749, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Yvonne Chak, MD prescribe under Medicare Part D?
In 2024, Yvonne Chak, MD had 63 Medicare Part D claims for 25 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.