Marissa Blum, MD
NPI 1316080229 · Rheumatology Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Blum, MD is a Rheumatology Physician provider in Philadelphia, PA (NPI 1316080229).
Provider details
- NPI number
- 1316080229
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD431822 (PA)
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
19 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
134 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 71 | $99 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 51 | $136 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 12 | $67 |
Typical Medicare-allowed amounts for these services range $67–$136 (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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 121 | 40 |
| Prednisone | 94 | 29 |
| Methotrexate Sodiumbrand: Methotrexate | 63 | 22 |
| Celecoxib | 59 | 23 |
| Gabapentin | 42 | 20 |
| Adalimumabbrand: Humira(cf) Pen | 40 | — |
| Meloxicam | 37 |
Practice location
Mailing address
Additional practice locations (1)
- 3737 Market St8th FlPhiladelphia, PA 19104Phone: (215) 662-4333
Registry dates
- Enumerated
- 2007-02-14
- Last updated
- 2023-12-14
- Certified
- 2023-12-14
Frequently asked questions
- What is Marissa Blum's NPI number?
- Marissa Blum's National Provider Identifier (NPI) is 1316080229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Blum's specialty?
- Marissa Blum is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Marissa Blum located?
- Marissa Blum's practice location on file with NPPES is 3401 N Broad St, Philadelphia, PA 19140-5103.
- What is Marissa Blum's phone number?
- The practice phone number listed in the NPPES registry for Marissa Blum is (215) 707-4600.
- Does Marissa Blum accept Medicare?
- Marissa Blum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Blum's NPI active?
- Yes — Marissa Blum's NPI (1316080229) is active in the NPPES registry as of the last update on 2023-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.