Marshall Frieden, MD
NPI 1922636349 · Family Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall Frieden, MD is a Family Medicine Physician provider in Houston, TX (NPI 1922636349).
Provider details
- NPI number
- 1922636349
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A190060 (CA)
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
6 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
153 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 97 | $97 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 56 | $137 |
Typical Medicare-allowed amounts for these services range $97–$137 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 63 | 28 |
| Atorvastatin Calcium | 43 | 21 |
| Zolpidem Tartrate | 28 | 12 |
| Amlodipine Besylate | 27 | 13 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 25 | — |
| Metformin Hcl | 23 | — |
Practice location
Mailing address
Additional practice locations (1)
- 200 W Arbor DrSan Diego, CA 92103-9000Phone: (800) 926-8273Fax: (888) 539-8781
Registry dates
- Enumerated
- 2020-03-31
- Last updated
- 2025-06-17
- Certified
- 2025-06-17
Frequently asked questions
- What is Marshall Frieden's NPI number?
- Marshall Frieden's National Provider Identifier (NPI) is 1922636349, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall Frieden's specialty?
- Marshall Frieden is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall Frieden located?
- Marshall Frieden's practice location on file with NPPES is 1100 W 34th St, Houston, TX 77018-6206.
- What is Marshall Frieden's phone number?
- The practice phone number listed in the NPPES registry for Marshall Frieden is (713) 861-3939.
- Does Marshall Frieden accept Medicare?
- Marshall Frieden is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall Frieden's NPI active?
- Yes — Marshall Frieden's NPI (1922636349) is active in the NPPES registry as of the last update on 2025-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.