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Edit this profileAt a glance
- 198 Groton Rd, Suite 1, Ayer, MA 01432
About Dr. Simpson
Stephen L. Simpson, M.D. is a specialist practicing in Ayer, MA. According to Medicare claims data, Stephen cared for 365 Medicare patients across 1,624 services. The services billed most often include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and aspiration and/or injection of fluid from large joint. This provider record is associated with NPI 1154322964.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (978) 862-0025
- Email not available
Practice Locations
198 GROTON RD SUITE 1
Ayer, MA 01432
Procedures Most Often Billed to Medicare
1,624 services · 365 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
95 | As often as other peers in Specialist |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
1,190 | More often than most peers in Specialist |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
215 | More often than most peers in Specialist |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
60 | As often as other peers in Specialist |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
45 | As often as other peers in Specialist |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
19 | Less often than most peers in Specialist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other specialists in Ayer 3
Same specialty, same city.
Also performs Aspiration and/or injection of fluid from large joint 1
Providers in MA who bill this service to Medicare most often.
Common questions
What does Stephen L. Simpson specialize in?
Stephen L. Simpson is a specialist in Ayer, MA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Stephen L. Simpson located?
Stephen L. Simpson is listed at 198 Groton Rd Suite 1, Ayer, MA 01432. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Stephen L. Simpson's phone number?
The number on file is (978) 862-0025. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Stephen L. Simpson's NPI number?
Stephen L. Simpson's National Provider Identifier is 1154322964. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Stephen L. Simpson been practicing?
Stephen L. Simpson has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Stephen L. Simpson do most often?
According to Medicare billing data, Stephen L. Simpson performs procedures including aspiration and/or injection of fluid from large joint, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Stephen L. Simpson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Stephen L. Simpson. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.