William Desmond McCallum, M.D.
Specialist · Mountain View, CA
William Desmond McCallum, M.D. is a specialist with a practice address in Mountain View, California, and NPI 1508978024, issued on Aug 31, 2006. Check the license (California A30537, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Desmond McCallum
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A30537 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1580 W EL Camino Real Ste 1, Mountain View, CA 94040
- Phone
- (650) 964-1505
- Enumerated
- Aug 31, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (650) 964-1522
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Verify William Desmond McCallum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A30537Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Desmond McCallum among 5,749 specialist records in California
William Desmond McCallum, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileNo · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2007 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,749 in California → Every provider in Mountain View → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Ramtin Agah, M.D.Mountain View, CA 940401255326310
- Charles Barrett, M.D.Mountain View, CA 940401316010556
- Dominick Curatola, M.D.Mountain View, CA 940401730182643
- David Francisco, MD., PH.D.Mountain View, CA 940401326072885
- Jean Gordon, M.D.,PH.D.Mountain View, CA 940401306920822
- Robert Liner, M.D.Mountain View, CA 940401629267117
- Robert Lowen, MDMountain View, CA 940401659452787
- Douglas McNeil, M.D.Mountain View, CA 940401841363934
Common questions
What is William Desmond McCallum, M.D.'s NPI number?
William Desmond McCallum, M.D.'s National Provider Identifier (NPI) is 1508978024, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Desmond McCallum, M.D. located?
The NPPES record lists a practice address at 1580 W EL Camino Real Ste 1, Mountain View, CA, 94040. Phone: (650) 964-1505. Providers update this record themselves, so call before visiting.
How can I verify William Desmond McCallum, M.D.'s license?
NPPES lists California license number A30537, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.