Stephen L. Simpson, M.D.
Specialist · Ayer, MA
Stephen L. Simpson, M.D. is a specialist with a practice address in Ayer, Massachusetts, and NPI 1154322964, issued on Aug 2, 2005. Check the license (Massachusetts 205051, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephen L. Simpson
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 205051 MA
Self-reported in NPPES; status is on the state search - Practice location
- 198 Groton RD, Ayer, MA 01432
- Phone
- (978) 862-0025
- Enumerated
- Aug 2, 2005
- Record last updated
- May 14, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (978) 862-0049
- Medicaid ID
- 0101877 MA
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,096 in Massachusetts → Look up another NPI →
Verify Stephen L. Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 205051Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average specialist in 2024
28 Medicare Part D claims for 17 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Cephalexin11 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: $21.04
1 payment: food and beverage; the largest payer was Stryker Corporation. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Stephen L. Simpson among 1,096 specialist records in Massachusetts
Stephen L. Simpson, M.D. is one of 1,096 specialist records with a practice address in Massachusetts. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2008 · 82% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 specialist records list a practice address in Ayer
They are 5 of the 118 NPPES records with a practice address in Ayer, and 1,096 specialist records in Massachusetts.
All 1,096 in Massachusetts → Every provider in Ayer → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Jessica AraujoAyer, MA 014321952265852
- Phillip Buchieri, P.T.Ayer, MA 014321235262429
- Paul Harasimowicz, M. D.Ayer, MA 014321538152574
- Jonathan Held, M.D.Ayer, MA 014321699767608
- April Boettcher, ATC, LATAshburnham, MA 014301982649737
- Victoria GaouetteGardner, MA 014401295932705
- Troy Leblanc, LMHCGardner, MA 014401710096680
- Andrea Rosenthal, M.D.Gardner, MA 014401477651461
Common questions
What is Stephen L. Simpson, M.D.'s NPI number?
Stephen L. Simpson, M.D.'s National Provider Identifier (NPI) is 1154322964, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Stephen L. Simpson, M.D. located?
The NPPES record lists a practice address at 198 Groton RD, Ayer, MA, 01432. Phone: (978) 862-0025. Providers update this record themselves, so call before visiting.
How can I verify Stephen L. Simpson, M.D.'s license?
NPPES lists Massachusetts license number 205051, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Stephen L. Simpson, M.D. prescribe under Medicare Part D?
In 2024, Stephen L. Simpson, M.D. had 28 Medicare Part D claims for 17 beneficiaries; the average among specialist prescribers was 1,380. 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.