Physician Profile
Unclaimed ProfileAbout MAK
Based in Palo Alto, CA, Yinchong Erica Mak, MD is listed in the NPI registry under internal medicine. Yinchong graduated from University of Pittsburgh School of Medicine in 2009. Yinchong is also listed as specializing in student in an organized health care education program. Medicare claims data shows Yinchong provided 771 services to 617 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (650) 321-4121
- Email not available
Practice Locations
795 EL CAMINO REAL
Palo Alto, CA 94040
Procedures Most Often Billed to Medicare
771 services · 617 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of impacted ear wax by washing | Procedure | 69209 |
13 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
30 |
| Influenza vaccine, inactivated | Treatment | 90653 |
19 |
| Sarscov2 vac 50 mcg/0.5ml im | Treatment | 91322 |
11 |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
11 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
221 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
215 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
117 |
| 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 |
46 |
| Administration of pneumococcal vaccine | Billing code | G0009 |
33 |
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 internal medicines at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other internal medicines in Palo Alto 6
Same specialty, same city.
Trained at University of Pittsburgh School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2009 at University of Pittsburgh School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of impacted ear wax by washing 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Mak specialize in?
Dr. Mak is an internal medicine in Palo Alto, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Mak located?
Dr. Mak is listed at 795 EL CAMINO REAL, Palo Alto, CA 94040. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Mak's phone number?
The number on file is (650) 321-4121. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Mak?
Dr. Mak's National Provider Identifier is 1982930491. 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 Dr. Mak go to medical school?
Dr. Mak attended University of Pittsburgh School of Medicine, graduating in 2009. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mak have?
Dr. Mak has 17 years experience. Calculated from a graduation year of 2009, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Mak do most often?
According to Medicare billing data, Dr. Mak performs procedures including removal of impacted ear wax by washing; provides treatments such as pneumococcal conjugate vaccine, 20 valent , for intramuscular use and influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mak's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mak. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.