Melissa A. Gregg, NP
Family Nurse Practitioner · Costa Mesa, CA
Melissa A. Gregg, NP is a family nurse practitioner with a practice address in Costa Mesa, California, and NPI 1255054490, issued on Sep 22, 2022. Check the license (California 95019125, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Melissa A. Gregg
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 95019125 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1150 Baker St, Costa Mesa, CA 92626
- Phone
- (866) 389-2727
- Enumerated
- Sep 22, 2022
- Record last updated
- Sep 22, 2022
- Medicare enrollment
- Enrolled (PECOS I20221121002805); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 1150 Baker St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Heesook Choi, NPFamily Nurse Practitioner1679068845
- Amber Espinola, PHARMDPharmacist1093176885
- Melissa Fryhling, PHARMD.Pharmacist1740900406
- Stephanie KimPharmacist1801459458
- Kendra Latty, FNP-CFamily Nurse Practitioner1659763589
- Ngan LyPharmacist1073235099
Verify Melissa A. Gregg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95019125Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average family nurse practitioner in 2024
149 Medicare Part D claims for 35 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa15 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): 78.7 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).
Industry payments in 2024: $55.50
1 payment: food and beverage; the largest payer was Phadia US Inc. The 99,489 providers of this specialty with any payment received $650.95 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
- The Roads Foundation, IncCompton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Melissa A. Gregg among 16,966 family nurse practitioner records in California
Melissa A. Gregg, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 68% of them.
- NPI issued2022 · 68% of these records are older, 25% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2018 · median 2019 among the 6,793 with a school on file
- Record last updated2022 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
71 family nurse practitioner records list a practice address in Costa Mesa
They are 71 of the 4,286 NPPES records with a practice address in Costa Mesa, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Costa Mesa → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Andrea Beyaoju, NURSE PRACTITIONERCosta Mesa, CA 926261720520182
- Susan FlamingCosta Mesa, CA 926261780093237
- Arnold FrancoCosta Mesa, CA 926261518417633
- Suzanne Larkin, FNP-CCosta Mesa, CA 926261053358044
- Kendra Latty, FNP-CCosta Mesa, CA 926261659763589
- Shelly Lummus, FNPCosta Mesa, CA 926261649474545
- Jamila Ponder, F.N.P.-CCosta Mesa, CA 926261124215165
- Charlotte Russell, RNPCosta Mesa, CA 926261780636555
Common questions
What is Melissa A. Gregg, NP's NPI number?
Melissa A. Gregg, NP's National Provider Identifier (NPI) is 1255054490, issued on Sep 22, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Melissa A. Gregg, NP located?
The NPPES record lists a practice address at 1150 Baker St, Costa Mesa, CA, 92626. Phone: (866) 389-2727. Providers update this record themselves, so call before visiting.
How can I verify Melissa A. Gregg, NP's license?
NPPES lists California license number 95019125, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Melissa A. Gregg, NP prescribe under Medicare Part D?
In 2024, Melissa A. Gregg, NP had 149 Medicare Part D claims for 35 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is Melissa A. Gregg, NP's MIPS final score?
The 2023 MIPS final score is 78.7 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.