Maria Santos-Montemayor, MD
NPI 1316974397 · Internal Medicine Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Santos-Montemayor, MD is a Internal Medicine Physician provider in Arcadia, CA (NPI 1316974397).
Provider details
- NPI number
- 1316974397
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 042995 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
332 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) |
|---|---|---|
| Urinalysis, Manual Test81002 | 79 | $3 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 72 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 59 | $140 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 50 | $62 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 38 | $21 |
| Administration of Influenza Virus VaccineG0008 | 22 | $35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 122 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 525 | 148 |
| Atorvastatin Calcium | 450 | 138 |
| Rosuvastatin Calcium | 328 | 102 |
| Lisinopril | 324 | 90 |
| Losartan Potassium | 300 | 92 |
| Levothyroxine Sodium | 289 | 83 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-27
- Last updated
- 2026-01-09
- Certified
- 2026-01-09
Frequently asked questions
- What is Maria Santos-Montemayor's NPI number?
- Maria Santos-Montemayor's National Provider Identifier (NPI) is 1316974397, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Santos-Montemayor's specialty?
- Maria Santos-Montemayor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Santos-Montemayor located?
- Maria Santos-Montemayor's practice location on file with NPPES is 450 E Huntington Dr, Arcadia, CA 91006-3748.
- What is Maria Santos-Montemayor's phone number?
- The practice phone number listed in the NPPES registry for Maria Santos-Montemayor is (626) 462-1884.
- Does Maria Santos-Montemayor accept Medicare?
- Maria Santos-Montemayor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Santos-Montemayor's NPI active?
- Yes — Maria Santos-Montemayor's NPI (1316974397) is active in the NPPES registry as of the last update on 2026-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.