Anna Zajac, MD
NPI 1578794335 · Family Medicine Physician · Hillsborough, NJ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anna Zajac, MD is a Family Medicine Physician provider in Hillsborough, NJ (NPI 1578794335).
Provider details
- NPI number
- 1578794335
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA08895800 (NJ)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
524 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 | 248 | $85 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 122 | $56 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 96 | $103 |
| Urinalysis, Manual Test81002 | 26 | $3 |
| Administration of Influenza Virus VaccineG0008 | 20 | $36 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 355 | 99 |
| Amlodipine Besylate | 206 | 67 |
| Levothyroxine Sodium | 149 | 41 |
| Rosuvastatin Calcium | 145 | 57 |
| Metformin Hclbrand: Metformin Hcl Er | 127 | 37 |
| Lisinopril | 124 | 32 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-28
- Last updated
- 2017-03-13
Frequently asked questions
- What is Anna Zajac's NPI number?
- Anna Zajac's National Provider Identifier (NPI) is 1578794335, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anna Zajac's specialty?
- Anna Zajac is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Anna Zajac located?
- Anna Zajac's practice location on file with NPPES is 331 Route 206, Hillsborough, NJ 08844-4781.
- What is Anna Zajac's phone number?
- The practice phone number listed in the NPPES registry for Anna Zajac is (908) 685-2528.
- Does Anna Zajac accept Medicare?
- Anna Zajac is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anna Zajac's NPI active?
- Yes — Anna Zajac's NPI (1578794335) is active in the NPPES registry as of the last update on 2017-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.