Ann York Kao, MD
Internal Medicine Physician · Chelsea, MA
Ann York Kao, MD is an internal medicine physician with a practice address in Chelsea, Massachusetts, and NPI 1588643282, issued on Jan 11, 2006. Check the license (Massachusetts 220229, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ann York Kao
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 220229 MA
Self-reported in NPPES; status is on the state search - Practice location
- 151 Everett Ave C51, Chelsea, MA 02150
- Phone
- (617) 884-8302
- Enumerated
- Jan 11, 2006
- Record last updated
- Aug 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (617) 887-3704
- Medicaid ID
- 2070791 MA
- Medicare enrollment
- Enrolled (PECOS I20040729000963); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Ann York Kao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ann York Kao among 6,825 internal medicine physician records in Massachusetts
Ann York Kao, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2000 · median 2004 among the 4,103 with a school on file
- Record last updated2012 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 internal medicine physician records list a practice address in Chelsea
They are 36 of the 998 NPPES records with a practice address in Chelsea, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Chelsea → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sefik Abdulhayoglu, MDChelsea, MA 021501659358166
- Jose Abrego, MDChelsea, MA 021501205808722
- Nancy Adams, M.D.Chelsea, MA 021501649236365
- Wynne Armand, MDChelsea, MA 021501497745939
- Judith Fisch, MDChelsea, MA 021501487644126
- Herman Gomez, MDChelsea, MA 021501639153414
- Cindy Levine, M.D.Chelsea, MA 021501437137270
- Victor Lewis, MDChelsea, MA 021501376525725
Common questions
What is Ann York Kao, MD's NPI number?
Ann York Kao, MD's National Provider Identifier (NPI) is 1588643282, issued on Jan 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ann York Kao, MD located?
The NPPES record lists a practice address at 151 Everett Ave C51, Chelsea, MA, 02150. Phone: (617) 884-8302. Providers update this record themselves, so call before visiting.
How can I verify Ann York Kao, MD's license?
NPPES lists Massachusetts license number 220229, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. 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.