John S. Walker, D.O.
Anesthesiology Physician · Somerset, NJ
John S. Walker, D.O. is an anesthesiology physician with a practice address in Somerset, New Jersey, and NPI 1013974500, issued on Apr 27, 2006. Check the license (New Jersey MB56549, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John S. Walker
- Credential
- D.O.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- MB56549 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 285 Davidson Ave, Somerset, NJ 08873
- Phone
- (732) 271-1400
- Enumerated
- Apr 27, 2006
- Record last updated
- Feb 27, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (732) 271-3543
- Medicaid ID
- 6269907 NJ
- Medicare enrollment
- Enrolled (PECOS I20080801000477); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 1990
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,714 in New Jersey → Look up another NPI →
Also registered at 285 Davidson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeremy Baron, MDAnesthesiology Physician1801090667
- Daniela Cean, DOPediatric Anesthesiology Physician1053622605
- Ching-Ming Chen, M.D.Anesthesiology Physician1396702551
- Grace Cho, M.D.Anesthesiology Physician1396700282
- Jieun Choi, M.D.Anesthesiology Physician1205881943
- Richard Colavita, M.D.Anesthesiology Physician1730144627
Verify John S. Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license MB56549Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $124.10
3 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Rwjbh Observation Associates LLCSomerville, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John S. Walker among 1,714 anesthesiology physician records in New Jersey
John S. Walker, D.O. is one of 1,714 anesthesiology physician records with a practice address in New Jersey. 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 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 44% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1990 · median 2002 among the 1,178 with a school on file
- Record last updated2018 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 anesthesiology physician records list a practice address in Somerset
They are 61 of the 1,061 NPPES records with a practice address in Somerset, and 1,714 anesthesiology physician records in New Jersey.
All 1,714 in New Jersey → Every provider in Somerset → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Grace Cho, M.D.Somerset, NJ 088731396700282
- Richard Colavita, M.D.Somerset, NJ 088731730144627
- Richard Cottrill, M.D.Somerset, NJ 088731124083811
- Paul Fellenbaum, M.D.Somerset, NJ 088731922063031
- Jan Gajewski, M.D.Somerset, NJ 088731437114097
- Gail Granowitz, M.D.Somerset, NJ 088731487619003
- Mourad Henein, M.D.Somerset, NJ 088731538124151
- Tzu Hsu, M.D.Somerset, NJ 088731588629877
Common questions
What is John S. Walker, D.O.'s NPI number?
John S. Walker, D.O.'s National Provider Identifier (NPI) is 1013974500, issued on Apr 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John S. Walker, D.O. located?
The NPPES record lists a practice address at 285 Davidson Ave, Somerset, NJ, 08873. Phone: (732) 271-1400. Providers update this record themselves, so call before visiting.
How can I verify John S. Walker, D.O.'s license?
NPPES lists New Jersey license number MB56549, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.