Mariel Muriel Pastrana, MD
NPI 1538488580 · Internal Medicine Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariel Muriel Pastrana, MD is a Internal Medicine Physician provider in Walnut Creek, CA (NPI 1538488580).
Provider details
- NPI number
- 1538488580
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A127358 (CA)
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
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
409 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 Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 237 | $86 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 75 | $54 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 46 | $125 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 22 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 16 | $193 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Pantoprazole Sodium | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 2185 Citracado PkwyEscondido, CA 92029-4159Phone: (760) 291-6700
Registry dates
- Enumerated
- 2010-05-28
- Last updated
- 2025-01-29
- Certified
- 2025-01-29
Frequently asked questions
- What is Mariel Muriel Pastrana's NPI number?
- Mariel Muriel Pastrana's National Provider Identifier (NPI) is 1538488580, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariel Muriel Pastrana's specialty?
- Mariel Muriel Pastrana is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mariel Muriel Pastrana located?
- Mariel Muriel Pastrana's practice location on file with NPPES is 1220 Rossmoor Pkwy, Walnut Creek, CA 94595-2501.
- What is Mariel Muriel Pastrana's phone number?
- The practice phone number listed in the NPPES registry for Mariel Muriel Pastrana is (925) 947-3393.
- Does Mariel Muriel Pastrana accept Medicare?
- Mariel Muriel Pastrana is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariel Muriel Pastrana's NPI active?
- Yes — Mariel Muriel Pastrana's NPI (1538488580) is active in the NPPES registry as of the last update on 2025-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.