William Reginald Spencer, PA-C
Medical Physician Assistant · Bel Air, MD
William Reginald Spencer, PA-C is a medical physician assistant with a practice address in Bel Air, Maryland, and NPI 1679880066, issued on Sep 7, 2010. Check the license (Maryland C0004283, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Reginald Spencer
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- C0004283 MD
MA056654 PA
Self-reported in NPPES; status is on the state search - Practice location
- 520 Upper Chesapeake Dr, Bel Air, MD 21014
- Phone
- (443) 643-1000
- Enumerated
- Sep 7, 2010
- Record last updated
- Dec 19, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 871 in Maryland → Look up another NPI →
Also registered at 520 Upper Chesapeake Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Reginald Spencer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license C0004283Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average medical physician assistant in 2024
180 Medicare Part D claims for 126 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Prednisone21 claims
- Ondansetron Odt13 claims
- Doxycycline Hyclate11 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.
William Reginald Spencer among 871 medical physician assistant records in Maryland
William Reginald Spencer, PA-C is one of 871 medical physician assistant records with a practice address in Maryland. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 45% of them.
- NPI issued2010 · 45% of these records are older, 50% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 54% of these records are
- Record last updated2020 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 medical physician assistant records list a practice address in Bel Air
They are 23 of the 1,945 NPPES records with a practice address in Bel Air, and 871 medical physician assistant records in Maryland.
All 871 in Maryland → Every provider in Bel Air → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Olusumbo AladeBel Air, MD 210141417484965
- David Ericson, PA-CBel Air, MD 210141568560761
- Nicole Green, PA-CBel Air, MD 210141053873786
- Ann Mathew, PABel Air, MD 210141699821819
- Sarah Mohr, PA-CBel Air, MD 210141730499070
- Song Moon, PA-CBel Air, MD 210141740308501
- Nicole Ogle, PA-CBel Air, MD 210141215208426
- Julio Perez, PA-CBel Air, MD 210141225072200
Common questions
What is William Reginald Spencer, PA-C's NPI number?
William Reginald Spencer, PA-C's National Provider Identifier (NPI) is 1679880066, issued on Sep 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is William Reginald Spencer, PA-C located?
The NPPES record lists a practice address at 520 Upper Chesapeake Dr, Bel Air, MD, 21014. Phone: (443) 643-1000. Providers update this record themselves, so call before visiting.
How can I verify William Reginald Spencer, PA-C's license?
NPPES lists Maryland license number C0004283, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does William Reginald Spencer, PA-C prescribe under Medicare Part D?
In 2024, William Reginald Spencer, PA-C had 180 Medicare Part D claims for 126 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.