Guy L. Fish, M.D.
Internal Medicine Physician · Boston, MA
Guy L. Fish, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1013955301, issued on Jun 2, 2006. Check the license (Massachusetts 211667, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Guy L. Fish
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 211667 MA
Self-reported in NPPES; status is on the state search - Practice location
- 222 Berkeley Street, 20TH Floor, Boston, MA 02116
- Phone
- (617) 247-6700
- Enumerated
- Jun 2, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Guy L. Fish in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 211667Check 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: $5,000.00
2 payments; by number, the most common kind was charitable contribution; the largest payer was Genetics Institute LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Guy L. Fish among 6,825 internal medicine physician records in Massachusetts
Guy L. Fish, M.D. 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 fileNo · 60% of these records are
- Record last updated2026 · 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).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- James Bonanno, MDBoston, MA 021161760461115
- Bryan Bordeaux, D.O.Boston, MA 021161972560696
- Moira Cunningham, M.D.Boston, MA 021161437120995
- Federico Erebia, M.D.Boston, MA 021161588639744
- Monica Gomez, MDBoston, MA 021161174585368
- Yun Lam, M.D.Boston, MA 021161134100894
- Katherine Lantsman, M.D.Boston, MA 021161720052475
- Frederick LeeBoston, MA 021161295710473
Common questions
What is Guy L. Fish, M.D.'s NPI number?
Guy L. Fish, M.D.'s National Provider Identifier (NPI) is 1013955301, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Guy L. Fish, M.D. located?
The NPPES record lists a practice address at 222 Berkeley Street, 20TH Floor, Boston, MA, 02116. Phone: (617) 247-6700. Providers update this record themselves, so call before visiting.
How can I verify Guy L. Fish, M.D.'s license?
NPPES lists Massachusetts license number 211667, 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.