Robert L. Neilan, M.D.
Hospitalist Physician · Fountain Valley, CA
Robert L. Neilan, M.D. is a hospitalist physician with a practice address in Fountain Valley, California, and NPI 1689763724, issued on Oct 12, 2006. Check the license (California A70376, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert L. Neilan
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A70376 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17360 Brookhurst St, Fountain Valley, CA 92708
- Phone
- (949) 340-9530
- Enumerated
- Oct 12, 2006
- Record last updated
- Mar 27, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (714) 665-4614
- Medicare enrollment
- Enrolled (PECOS I20140123000733); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 17360 Brookhurst St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gail Frances Liezl Abcede, M.D.Internal Medicine Physician1902216872
- Dustin ArbuckleClinical Social Worker1528715547
- Behnaz Babaknia, PA-CPhysician Assistant1992275093
- Brett BatesStudent in an Organized Health Care Education/Training Program1609315134
- Gina Bell, M.D.Family Medicine Physician1750589032
- Michael Benefiel, M.D.Internal Medicine Physician1861855827
Verify Robert L. Neilan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A70376Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average hospitalist physician in 2024
339 Medicare Part D claims for 170 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Metoprolol Succinate26 claims
- Furosemide19 claims
- Prednisone16 claims
- Amoxicillin-Clavulanate Potass15 claims
- Atorvastatin Calcium14 claims
- Eliquis14 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): 76.7 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).
Bills Medicare through one group practice
- Memorialcare Medical FoundationLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert L. Neilan among 3,099 hospitalist physician records in California
Robert L. Neilan, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1994 · median 2010 among the 2,505 with a school on file
- Record last updated2018 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Fountain Valley → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- David Chan, D.O.Fountain Valley, CA 927081497068688
- Sara Ghazi, DOFountain Valley, CA 927081861816886
- Iris Gluzman, MDFountain Valley, CA 927081447323613
- Yu-Nan Hsu, D.OFountain Valley, CA 927081922382407
- Tony Khan, DOFountain Valley, CA 927081255625786
- Billy Le, D.O.Fountain Valley, CA 927081255656963
- Sapna Mehta, DOFountain Valley, CA 927081477847382
- Vina Nguyen, M. D.Fountain Valley, CA 927081013250497
Common questions
What is Robert L. Neilan, M.D.'s NPI number?
Robert L. Neilan, M.D.'s National Provider Identifier (NPI) is 1689763724, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert L. Neilan, M.D. located?
The NPPES record lists a practice address at 17360 Brookhurst St, Fountain Valley, CA, 92708. Phone: (949) 340-9530. Providers update this record themselves, so call before visiting.
How can I verify Robert L. Neilan, M.D.'s license?
NPPES lists California license number A70376, 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 Robert L. Neilan, M.D. prescribe under Medicare Part D?
In 2024, Robert L. Neilan, M.D. had 339 Medicare Part D claims for 170 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Robert L. Neilan, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.7 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.