Christina Nakyung Ryu, M.D.
Endocrinology, Diabetes & Metabolism Physician · San Francisco, CA
Christina Nakyung Ryu, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in San Francisco, California, and NPI 1518491158, issued on Apr 19, 2017. Check the license (California A159726, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christina Nakyung Ryu
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- A159726 CA
12229699 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Van Ness Ave, San Francisco, CA 94109
- Phone
- (415) 600-0110
- Enumerated
- Apr 19, 2017
- Record last updated
- Jul 19, 2022
- Fax
- (415) 558-7038
- Medicare enrollment
- Enrolled (PECOS I20220801002025); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1100 Van Ness Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anousheh Afjei, MDInternal Medicine Physician1992365431
- Mohammed Ahmed, MDInternal Medicine Physician1700245115
- Haila AlbgalFamily Nurse Practitioner1417566043
- Ashley Arnold, LCSWClinical Social Worker1710559687
- Anjali Asrani, NPNurse Practitioner1184279770
- Ginny BaoEndocrinology, Diabetes & Metabolism Physician1801383286
Verify Christina Nakyung Ryu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A159726Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,210 Medicare Part D claims for 158 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Ozempic187 claims
- Levothyroxine Sodium103 claims
- Atorvastatin Calcium71 claims
- Jardiance54 claims
- Nano 2nd Gen Pen Needle54 claims
- Lantus Solostar43 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: $20.52
1 payment: food and beverage; the largest payer was Dexcom, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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 FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christina Nakyung Ryu among 1,131 endocrinology, diabetes & metabolism physician records in California
Christina Nakyung Ryu, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 89% of them.
- NPI issued2017 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2017 · median 2003 among the 779 with a school on file
- Record last updated2022 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in San Francisco → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Diana Antoniucci, MDSan Francisco, CA 941091164486676
- Wade Aubry, M.DSan Francisco, CA 941091447265814
- Ginny BaoSan Francisco, CA 941091801383286
- Kjersti Kirkeby, M.D.San Francisco, CA 941091811182454
- Hanna Rifkin, RDSan Francisco, CA 941091093225443
- Amita RisbudSan Francisco, CA 941091194353490
- Ashlee Sidhu, MBBSSan Francisco, CA 941091538746078
- Melissa Weinberg, M.D.San Francisco, CA 941091659399079
Common questions
What is Christina Nakyung Ryu, M.D.'s NPI number?
Christina Nakyung Ryu, M.D.'s National Provider Identifier (NPI) is 1518491158, issued on Apr 19, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Christina Nakyung Ryu, M.D. located?
The NPPES record lists a practice address at 1100 Van Ness Ave, San Francisco, CA, 94109. Phone: (415) 600-0110. Providers update this record themselves, so call before visiting.
How can I verify Christina Nakyung Ryu, M.D.'s license?
NPPES lists California license number A159726, 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 Christina Nakyung Ryu, M.D. prescribe under Medicare Part D?
In 2024, Christina Nakyung Ryu, M.D. had 1,210 Medicare Part D claims for 158 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.