Spencer Barrett Tilley, MD
Family Medicine Physician · Fremont, CA
Spencer Barrett Tilley, MD is a family medicine physician with a practice address in Fremont, California, and NPI 1710171038, issued on Aug 29, 2007. Check the license (California 104565, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Spencer Barrett Tilley
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 104565 CA
43954 CO
Self-reported in NPPES; status is on the state search - Practice location
- 39225 State St, Fremont, CA 94538
- Phone
- (510) 794-1990
- Enumerated
- Aug 29, 2007
- Record last updated
- Jul 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (510) 794-1341
- Medicare enrollment
- Enrolled (PECOS I20090805000807); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 39225 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Navdeep Bhangoo, NPFamily Nurse Practitioner1558068825
- Anmol Mahal, M.D.Gastroenterology Physician1609931526
- Subena Tilley, D.O.Adult Medicine Physician1265578793
Verify Spencer Barrett Tilley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 104565Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average family medicine physician in 2024
5,347 Medicare Part D claims for 439 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 119 claims were for opioids.
Most prescribed
- Atorvastatin Calcium410 claims
- Losartan Potassium327 claims
- Levothyroxine Sodium214 claims
- Amlodipine Besylate185 claims
- Metformin Hcl143 claims
- Tamsulosin Hcl123 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $252.56
9 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- Medical Associates OF Fremont IncFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Spencer Barrett Tilley among 17,133 family medicine physician records in California
Spencer Barrett Tilley, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2004 · median 2005 among the 10,652 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
90 family medicine physician records list a practice address in Fremont
They are 90 of the 4,749 NPPES records with a practice address in Fremont, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Fremont → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Arshia Arjumand, MDFremont, CA 945381215961917
- Jan Dickey, MDFremont, CA 945381134153752
- Gail Dressler, MDFremont, CA 945381821004847
- Caroline Garcia, MDFremont, CA 945381922114180
- Kelly Renee Miller, MDFremont, CA 945381841286705
- Durriyah Mogri, MDFremont, CA 945381386670784
- Aruna Reddy, MDFremont, CA 945381225034556
- Ranjana Sharma, MDFremont, CA 945381548270119
Common questions
What is Spencer Barrett Tilley, MD's NPI number?
Spencer Barrett Tilley, MD's National Provider Identifier (NPI) is 1710171038, issued on Aug 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Barrett Tilley, MD located?
The NPPES record lists a practice address at 39225 State St, Fremont, CA, 94538. Phone: (510) 794-1990. Providers update this record themselves, so call before visiting.
How can I verify Spencer Barrett Tilley, MD's license?
NPPES lists California license number 104565, 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.
How much does Spencer Barrett Tilley, MD prescribe under Medicare Part D?
In 2024, Spencer Barrett Tilley, MD had 5,347 Medicare Part D claims for 439 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions 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. 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.