Monika Mahajan
NPI 1255354866 · Internal Medicine Physician · Allentown, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Monika Mahajan is a Internal Medicine Physician provider in Allentown, PA (NPI 1255354866).
Provider details
- NPI number
- 1255354866
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- MD420619 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
978 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 461 | $120 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 259 | $122 |
| Administration of Influenza Virus VaccineG0008 | 60 | $31 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 | 37 | $195 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 36 | $13 |
| Admn Sarscov2 Vacc 1 Dose90480 | 25 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 81 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 391 | 112 |
| Losartan Potassium | 320 | 89 |
| Atorvastatin Calcium | 284 | 85 |
| Rosuvastatin Calcium | 235 | 70 |
| Amlodipine Besylate | 228 | 61 |
| Omeprazole | 218 | 56 |
| Alprazolam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2015-11-19
Frequently asked questions
- What is Monika Mahajan's NPI number?
- Monika Mahajan's National Provider Identifier (NPI) is 1255354866, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Monika Mahajan's specialty?
- Monika Mahajan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Monika Mahajan located?
- Monika Mahajan's practice location on file with NPPES is 1230 S Cedar Crest Blvd, Allentown, PA 18103-6367.
- What is Monika Mahajan's phone number?
- The practice phone number listed in the NPPES registry for Monika Mahajan is (610) 402-8950.
- Does Monika Mahajan accept Medicare?
- Monika Mahajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Monika Mahajan's NPI active?
- Yes — Monika Mahajan's NPI (1255354866) is active in the NPPES registry as of the last update on 2015-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.