Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Donald Calvin Fletcher, M.D.

Ophthalmology Physician in San Francisco, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689633638

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Registry record

Entity type Individual (Type 1)

Name Dr. Donald Calvin Fletcher

Credential M.D.

Sex Male

Practice address 2340 Clay St # 514, San Francisco, CA, 94115

Phone (415) 600-3901

Fax (415) 600-3949

Enumeration date Mar 20, 2006

Last updated in NPPES Oct 28, 2022

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 04-33631 (KS) Secondary

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 10260037-1205 (UT) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License ME0052066 (FL) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License G56961 (CA) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 04-33631 (KS) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
063296100	Medicaid	FL	-
180022165	Other	FL	RAILROAD MEDICARE
CA7010	Other	FL	RAILROAD MEDICARE GROUP
374440000	Medicaid	FL	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Donald Fletcher?

Donald Fletcher is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-28.