Katherine Nandor Alconcel, D.O.
Internal Medicine Physician · Apple Valley, CA
Katherine Nandor Alconcel, D.O. is an internal medicine physician with a practice address in Apple Valley, California, and NPI 1376864215, issued on Jun 15, 2010. Check the license (California 20A12724, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine Nandor Alconcel
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 20A12724 CA
DO3123 NV
Self-reported in NPPES; status is on the state search - Practice location
- 18300 US Highway 18, Apple Valley, CA 92307
- Phone
- (769) 946-4233
- Enumerated
- Jun 15, 2010
- Record last updated
- Nov 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20130801000235); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 18300 US Highway 18
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley AcasioElectroneurodiagnostic Specialist/Technologist1780511485
- Michael Adams, CNIMElectroneurodiagnostic Specialist/Technologist1750218418
- Samuel AdvinculaFamily Nurse Practitioner1962868844
- Kabir Ahmed, M.D.Anesthesiology Physician1659315729
- Robert Anderson, CRNACertified Registered Nurse Anesthetist1003010182
- Stephen Anderson, M.DEmergency Medicine Physician1659554194
Verify Katherine Nandor Alconcel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12724Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average internal medicine physician in 2024
742 Medicare Part D claims for 357 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa44 claims
- Azithromycin42 claims
- Amoxicillin-Clavulanate Potass35 claims
- Naproxen27 claims
- Doxycycline Hyclate26 claims
- Methylprednisolone26 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: $52.67
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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
- Providence Medical FoundationVictorville, CA
- Urgent Care Nevada LLCLas Vegas, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Nandor Alconcel among 17,696 internal medicine physician records in California
Katherine Nandor Alconcel, 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 updated2022 · 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).
29 internal medicine physician records list a practice address in Apple Valley
They are 29 of the 1,518 NPPES records with a practice address in Apple Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Apple Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ramesh Bambhania, M.D.Apple Valley, CA 923071093729436
- Robert Boldy, M.D.Apple Valley, CA 923071063507382
- Andres Gavino De La Llana, MDApple Valley, CA 923071497802094
- Alden Jallorina, M.D.Apple Valley, CA 923071982611521
- Mark Lauron, M.D.Apple Valley, CA 923071932179595
- Haichi Lin, M.DApple Valley, CA 923071891739694
- Dawit Mamo, M.D.Apple Valley, CA 923071346251568
- Tarek Moqattash, M.D.Apple Valley, CA 923071801029483
Common questions
What is Katherine Nandor Alconcel, D.O.'s NPI number?
Katherine Nandor Alconcel, D.O.'s National Provider Identifier (NPI) is 1376864215, issued on Jun 15, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Nandor Alconcel, D.O. located?
The NPPES record lists a practice address at 18300 US Highway 18, Apple Valley, CA, 92307. Phone: (769) 946-4233. Providers update this record themselves, so call before visiting.
How can I verify Katherine Nandor Alconcel, D.O.'s license?
NPPES lists California license number 20A12724, 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 Katherine Nandor Alconcel, D.O. prescribe under Medicare Part D?
In 2024, Katherine Nandor Alconcel, D.O. had 742 Medicare Part D claims for 357 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.