Mary Katherine Harper, DO
Emergency Medicine Physician · Rancho Mirage, CA
Mary Katherine Harper, DO is an emergency medicine physician with a practice address in Rancho Mirage, California, and NPI 1518297753, issued on Jan 11, 2010. Check the license (California 20A18856, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine Harper
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 20A18856 CA
005338 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 39000 Bob Hope Dr, Rancho Mirage, CA 92270
- Phone
- (760) 340-3911
- Enumerated
- Jan 11, 2010
- Record last updated
- Nov 6, 2025
- Fax
- (760) 773-1481
- Medicare enrollment
- Enrolled (PECOS I20100512000662); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 39000 Bob Hope Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benedict Abaya, FNP-BC, FNP-CFamily Nurse Practitioner1417685462
- Mehrdad Abbasi, MDInternal Medicine Physician1477646776
- Ala Abojaradeh, MDStudent in an Organized Health Care Education/Training Program1316733900
- Naeem Abu-Shehab, M.D.Hospitalist Physician1134363252
- Roux Abubakar, MDHospitalist Physician1982223822
- Mohammad Abushehab, MDStudent in an Organized Health Care Education/Training Program1457293516
Verify Mary Katherine Harper in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A18856Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average emergency medicine physician in 2024
341 Medicare Part D claims for 234 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 14 claims were for opioids.
Most prescribed
- Prednisone55 claims
- Cephalexin37 claims
- Azithromycin31 claims
- Naproxen24 claims
- Amoxicillin-Clavulanate Potass21 claims
- Cefdinir20 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 MIPS final score for 2023 (Medicare payment program): 41.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $213.47
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 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 5 group practices
- 303 Emergency Physicians PLLCPhoenix, AZ
- Emcare - Pnx Emergency Physicians LLCPhoenix, AZ
- Emergency Physicians Southwest PCPage, AZ
- Loop 101 Emergency Physicians LLCPhoenix, AZ
- Usacs Emergency Medicine OF Arizona LLCMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Katherine Harper among 7,751 emergency medicine physician records in California
Mary Katherine Harper, DO is one of 7,751 emergency 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 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2008 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
78 emergency medicine physician records list a practice address in Rancho Mirage
They are 78 of the 1,600 NPPES records with a practice address in Rancho Mirage, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Rancho Mirage → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peter Andersons, MDRancho Mirage, CA 922701144241571
- Edward Cooper, M.D.Rancho Mirage, CA 922701003852658
- Manuel Dejesus, MDRancho Mirage, CA 922701366463366
- Francis Domzalski, MDRancho Mirage, CA 922701225059223
- Andrea Hladik, MDRancho Mirage, CA 922701306867395
- Euthym Kontaxis, MDRancho Mirage, CA 922701063433068
- Dennis Magnotto, MDRancho Mirage, CA 922701700807799
- Sabin Manea, MDRancho Mirage, CA 922701518988500
Common questions
What is Mary Katherine Harper, DO's NPI number?
Mary Katherine Harper, DO's National Provider Identifier (NPI) is 1518297753, issued on Jan 11, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine Harper, DO located?
The NPPES record lists a practice address at 39000 Bob Hope Dr, Rancho Mirage, CA, 92270. Phone: (760) 340-3911. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine Harper, DO's license?
NPPES lists California license number 20A18856, 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 Mary Katherine Harper, DO prescribe under Medicare Part D?
In 2024, Mary Katherine Harper, DO had 341 Medicare Part D claims for 234 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Mary Katherine Harper, DO's MIPS final score?
The 2023 MIPS final score is 41.8 of 100. 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.