Xiao H. Wan, D.O.
Internal Medicine Physician · Lancaster, CA
Xiao H. Wan, D.O. is an internal medicine physician with a practice address in Lancaster, California, and NPI 1851616775, issued on Apr 3, 2010. Check the license (California 20A11881, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Xiao H. Wan
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A11881 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 W Avenue J, Lancaster, CA 93534
- Phone
- (626) 688-3568
- Enumerated
- Apr 3, 2010
- Record last updated
- May 29, 2024
- Fax
- (626) 688-3568
- Medicare enrollment
- Enrolled (PECOS I20121112000129); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1600 W Avenue J
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sam Abid, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1295366656
- Hazem Aboaid, MDInternal Medicine Physician1689323552
- Beverly Kim AgniPsychiatric/Mental Health Registered Nurse1194542761
- Josephine Aideloje, NPPsychiatric/Mental Health Nurse Practitioner1790272243
- Imaobong AliyuAdult Psychiatric/Mental Health Registered Nurse1497343206
- Sam Allen, MDObstetrics & Gynecology Physician1982740841
Verify Xiao H. Wan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11881Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
7,047 Medicare Part D claims for 626 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 354 claims were for opioids.
Most prescribed
- Atorvastatin Calcium302 claims
- Amlodipine Besylate259 claims
- Furosemide168 claims
- Hydrocodone-Acetaminophen160 claims
- Eliquis149 claims
- Levothyroxine Sodium141 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,469.40
17 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Horizon Multicare Group IncLancaster, CA
- Unified Health AssociatesLancaster, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Xiao H. Wan among 17,696 internal medicine physician records in California
Xiao H. Wan, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 internal medicine physician records list a practice address in Lancaster
They are 55 of the 4,273 NPPES records with a practice address in Lancaster, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Harihar Agarwal, M.D.Lancaster, CA 935341215964150
- Naili Chen, D.O., MPH, MASCLancaster, CA 935341649251661
- Anthony Dulgeroff, M.D.Lancaster, CA 935341720199763
- Antony Fung, MDLancaster, CA 935341477526846
- Miranda Gaw, MDLancaster, CA 935341891705885
- Marvin Ginsburg, M.D.Lancaster, CA 935341508976580
- Shahid Hassan, M.D.Lancaster, CA 935341851401988
- Charles Lim, M.D.Lancaster, CA 935341205947231
Common questions
What is Xiao H. Wan, D.O.'s NPI number?
Xiao H. Wan, D.O.'s National Provider Identifier (NPI) is 1851616775, issued on Apr 3, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Xiao H. Wan, D.O. located?
The NPPES record lists a practice address at 1600 W Avenue J, Lancaster, CA, 93534. Phone: (626) 688-3568. Providers update this record themselves, so call before visiting.
How can I verify Xiao H. Wan, D.O.'s license?
NPPES lists California license number 20A11881, 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 Xiao H. Wan, D.O. prescribe under Medicare Part D?
In 2024, Xiao H. Wan, D.O. had 7,047 Medicare Part D claims for 626 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Xiao H. Wan, D.O.'s MIPS final score?
The 2023 MIPS final score is 84 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.