Masha Nakelchik, M.D.
NPI 1255346623 · Internal Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Masha Nakelchik, M.D. is a Internal Medicine Physician provider in San Jose, CA (NPI 1255346623).
Provider details
- NPI number
- 1255346623
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A73689 (CA)
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
1,596 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 | 933 | $153 |
| Administration of Influenza Virus VaccineG0008 | 139 | $39 |
| Physician Or Allowed Practitioner Supervision of a Patient Receiving Medicare-Covered Services Provided By a Participating Home Health Agency (patient Not Present) Requiring Complex and Multidisciplinary Care Modalities Involving Regular Physician Or AllowG0181 | 110 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 91 | $99 |
| 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 | 59 | $19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 152 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 807 | 230 |
| Amlodipine Besylate | 472 | 131 |
| Levothyroxine Sodium | 432 | 115 |
| Losartan Potassium | 401 | 122 |
| Hydrochlorothiazide | 270 | 77 |
| Metoprolol Succinate | 265 | 82 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,181 across 184 records (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
- 2006-07-31
- Last updated
- 2011-09-15
Frequently asked questions
- What is Masha Nakelchik's NPI number?
- Masha Nakelchik's National Provider Identifier (NPI) is 1255346623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Masha Nakelchik's specialty?
- Masha Nakelchik is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Masha Nakelchik located?
- Masha Nakelchik's practice location on file with NPPES is 295 Oconnor Dr, San Jose, CA 95128-1624.
- What is Masha Nakelchik's phone number?
- The practice phone number listed in the NPPES registry for Masha Nakelchik is (408) 279-8173.
- Does Masha Nakelchik accept Medicare?
- Masha Nakelchik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Masha Nakelchik's NPI active?
- Yes — Masha Nakelchik's NPI (1255346623) is active in the NPPES registry as of the last update on 2011-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.