Maxwell Mayer, M.D.
NPI 1609123207 · Psychiatry Physician · Fall River, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maxwell Mayer, M.D. is a Psychiatry Physician provider in Fall River, MA (NPI 1609123207).
Provider details
- NPI number
- 1609123207
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 274121 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
487 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 397 | $49 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 90 | $78 |
Typical Medicare-allowed amounts for these services range $49–$78 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clozapine | 70 | 12 |
| Lorazepam | 35 | — |
| Propranolol Hclbrand: Propranolol Hcl Er | 27 | — |
| Atenolol | 16 | — |
| Clozapinebrand: Clozapine Odt | 14 | — |
| Aripiprazole Lauroxilbrand: Aristada | 12 | — |
| Aripiprazole | 11 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-08-14
- Last updated
- 2023-12-13
- Certified
- 2023-12-13
Frequently asked questions
- What is Maxwell Mayer's NPI number?
- Maxwell Mayer's National Provider Identifier (NPI) is 1609123207, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maxwell Mayer's specialty?
- Maxwell Mayer is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Maxwell Mayer located?
- Maxwell Mayer's practice location on file with NPPES is 49 Hillside St, Fall River, MA 02720-5211.
- What is Maxwell Mayer's phone number?
- The practice phone number listed in the NPPES registry for Maxwell Mayer is (508) 235-7333.
- Does Maxwell Mayer accept Medicare?
- Maxwell Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maxwell Mayer's NPI active?
- Yes — Maxwell Mayer's NPI (1609123207) is active in the NPPES registry as of the last update on 2023-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.