Physician Profile
Masha M. Nakelchik, M.D.
Unclaimed ProfileAbout Dr. Nakelchik
Based in San Jose, CA, Masha M. Nakelchik, M.D. is listed in the NPI registry under internal medicine. Medicare claims data shows Masha provided 1,759 services to 1,058 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, administration of influenza virus vaccine, and influenza vaccine, inactivated.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (408) 279-8173
- Email not available
Practice Locations
295 OCONNOR DR
San Jose, CA 95128
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
Preventive and evaluation
Screening and diagnostic testing
Bones & Joints
Brain and nerves
Cancer screening
Digestive
Exams & Consultations
Heart & Circulation
Heart health
Imaging referral
Immunizations
Lab tests
Lungs & Breathing
Metabolic & Weight
Minor procedures
Office procedures
Office Procedures
Pain management
Preventive & Routine Care
Screenings & Diagnostics
Sexual health
Procedures Most Often Billed to Medicare
1,759 services · 1,058 patients · 16 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine, inactivated | Treatment | 90653 |
123 | More than most peers in Internal Medicine |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
52 | More often than most peers in Internal Medicine |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
40 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
933 | More than most peers in Internal Medicine |
| Administration of influenza virus vaccine | Billing code | G0008 |
139 | More than most peers in Internal Medicine |
| 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 allo | Billing code | G0181 |
110 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
91 | As often as other peers in Internal Medicine |
| 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' | Billing code | G2211 |
59 | Less often than most peers in Internal Medicine |
| Administration of pneumococcal vaccine | Billing code | G0009 |
40 | More often than most peers in Internal Medicine |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99490 |
37 | Less often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other internists in San Jose 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1990 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine, inactivated 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Masha M. Nakelchik specialize in?
Masha M. Nakelchik is an internist in San Jose, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Masha M. Nakelchik located?
Masha M. Nakelchik is listed at 295 Oconnor Dr, San Jose, CA 95128. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Masha M. Nakelchik's phone number?
The number on file is (408) 279-8173. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Masha M. Nakelchik?
Masha M. Nakelchik's National Provider Identifier is 1255346623. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Masha M. Nakelchik train?
Masha M. Nakelchik attended Other, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Masha M. Nakelchik have?
Masha M. Nakelchik has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What does Masha M. Nakelchik do most often?
According to Medicare billing data, Masha M. Nakelchik provides treatments such as influenza vaccine, inactivated and routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Masha M. Nakelchik's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Masha M. Nakelchik. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.