Margaret Andersen, MD
NPI 1679642938 · Internal Medicine Physician · Valhalla, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Andersen, MD is a Internal Medicine Physician provider in Valhalla, NY (NPI 1679642938).
Provider details
- NPI number
- 1679642938
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 202880 (NY)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
294 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 75 | $19 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 66 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 55 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 48 | $95 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 34 | $150 |
| Administration of Pneumococcal Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 119 | 37 |
| Amlodipine Besylate | 113 | 41 |
| Levothyroxine Sodium | 82 | 28 |
| Losartan Potassium | 69 | 24 |
| Hydrochlorothiazide | 61 | 21 |
| Metoprolol Succinate | 59 | 15 |
| Simvastatin | 52 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-08
- Last updated
- 2016-10-27
Frequently asked questions
- What is Margaret Andersen's NPI number?
- Margaret Andersen's National Provider Identifier (NPI) is 1679642938, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Andersen's specialty?
- Margaret Andersen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Andersen located?
- Margaret Andersen's practice location on file with NPPES is 465 Columbus Ave Ste 370, Valhalla, NY 10595-1336.
- What is Margaret Andersen's phone number?
- The practice phone number listed in the NPPES registry for Margaret Andersen is (914) 769-1600.
- Does Margaret Andersen accept Medicare?
- Margaret Andersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Andersen's NPI active?
- Yes — Margaret Andersen's NPI (1679642938) is active in the NPPES registry as of the last update on 2016-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.