Ying Guo
Family Medicine Physician · Sunnyvale, CA
Ying Guo is a family medicine physician with a practice address in Sunnyvale, California, and NPI 1871054338, issued on Mar 27, 2019. Check the license (California 20A19933, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ying Guo
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A19933 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Old San Francisco RD, Sunnyvale, CA 94086
- Phone
- (408) 730-4262
- Enumerated
- Mar 27, 2019
- Record last updated
- Nov 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20221027000795); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 301 Old San Francisco RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wafa Aljuneidi, MSN, APRN-NP, FNP-CNurse Practitioner1083583991
- Aisha AminInternal Medicine Physician1013440981
- Joyce Ang, MDPediatrics Physician1346634698
- Lulua Bahrainwala, MD, MSFamily Medicine Physician1568949709
Verify Ying Guo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A19933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average family medicine physician in 2024
1,285 Medicare Part D claims for 147 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 11 claims were for opioids.
Most prescribed
- Atorvastatin Calcium141 claims
- Amlodipine Besylate99 claims
- Losartan Potassium64 claims
- Simvastatin60 claims
- Levothyroxine Sodium52 claims
- Metformin Hcl Er41 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $273.85
3 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationSunnyvale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ying Guo among 17,133 family medicine physician records in California
Ying Guo is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2019 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 family medicine physician records list a practice address in Sunnyvale
They are 33 of the 1,690 NPPES records with a practice address in Sunnyvale, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Sunnyvale → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lulua Bahrainwala, MD, MSSunnyvale, CA 940861568949709
- Andreea Doaga, MDSunnyvale, CA 940861730387853
- Barry Hansen, MDSunnyvale, CA 940861184663825
- Justin JuanSunnyvale, CA 940861942788823
- Angie Li, MDSunnyvale, CA 940861932636396
- Jian Ying Liang, MDSunnyvale, CA 940861316989296
- Yingchih Lin, MDSunnyvale, CA 940861194817635
- Kimberley Ma, D.OSunnyvale, CA 940861023384260
Common questions
What is Ying Guo's NPI number?
Ying Guo's National Provider Identifier (NPI) is 1871054338, issued on Mar 27, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Ying Guo located?
The NPPES record lists a practice address at 301 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (408) 730-4262. Providers update this record themselves, so call before visiting.
How can I verify Ying Guo's license?
NPPES lists California license number 20A19933, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ying Guo prescribe under Medicare Part D?
In 2024, Ying Guo had 1,285 Medicare Part D claims for 147 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.