Patti Allen, M.D.
Internal Medicine Physician · Sunnyvale, CA
Patti Allen, M.D. is an internal medicine physician with a practice address in Sunnyvale, California, and NPI 1659438489, issued on Jan 2, 2007. Check the license (California C52863, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Patti Allen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C52863 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Old San Francisco RD, Sunnyvale, CA 94086
- Phone
- (408) 730-4360
- Enumerated
- Jan 2, 2007
- Entity
- Type 1 · individual
Also registered at 401 Old San Francisco RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leone Baron, PT, DPTPhysical Therapist1538708839
- Priya Bhusri, M.D.Internal Medicine Physician1659386019
- Yeralis Cabrero, PT, DPTPhysical Therapist1639991714
- Rafael Cahill, DPTPhysical Therapist1235742057
- Natalie Chan, DPTPhysical Therapist1619730629
- Chung-Ying Chen, MDInternal Medicine Physician1457436081
Verify Patti Allen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C52863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
47 internal medicine physician records list a Sunnyvale practice address
They are 47 of the 1,690 NPPES records with a Sunnyvale practice address, and 20,403 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 47 in Sunnyvale → All 20,403 in California → Every provider in Sunnyvale →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Patti Allen, M.D.'s NPI number?
Patti Allen, M.D.'s National Provider Identifier (NPI) is 1659438489, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Patti Allen, M.D. located?
The NPPES record lists a practice address at 401 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (408) 730-4360. Providers update this record themselves, so call before visiting.
How can I verify Patti Allen, M.D.'s license?
NPPES lists California license number C52863, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.