Raymond Frederic Grenfell, MD
Endocrinology, Diabetes & Metabolism Physician · Jackson, MS
Raymond Frederic Grenfell, MD is an endocrinology, diabetes & metabolism physician with a practice address in Jackson, Mississippi, and NPI 1780899922, issued on May 11, 2007. Check the license (Mississippi 21031, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Raymond Frederic Grenfell
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 21031 MS
Self-reported in NPPES; status is on the state search - Practice location
- 971 Lakeland Dr, Jackson, MS 39216
- Phone
- (601) 948-5158
- Enumerated
- May 11, 2007
- Record last updated
- May 11, 2023
- Fax
- (601) 326-4265
- Medicare enrollment
- Enrolled (PECOS I20100730000877); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 55 in Mississippi → Look up another NPI →
Also registered at 971 Lakeland Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Raymond Frederic Grenfell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 21031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.4 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
11,656 Medicare Part D claims for 874 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Synthroid1,343 claims
- Levothyroxine Sodium828 claims
- Atorvastatin Calcium506 claims
- Jardiance472 claims
- Ozempic450 claims
- Glimepiride406 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): 87.6 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: $2,174.03
118 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 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
- Diabetes And Endocrine Center OF MSJackson, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Raymond Frederic Grenfell among 55 endocrinology, diabetes & metabolism physician records in Mississippi
Raymond Frederic Grenfell, MD is one of 55 endocrinology, diabetes & metabolism physician records with a practice address in Mississippi. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 47% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2005 · median 2005 among the 39 with a school on file
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Mississippi
There are 55 endocrinology, diabetes & metabolism physician records in Mississippi.
All 55 in Mississippi → Every provider in Jackson → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Sandhya Bogi, M.D.Jackson, MS 392161306167788
- Eric Dyess, M.D.Jackson, MS 392161699783928
- Robert Evans, M.D.Jackson, MS 392161255349502
- Vishnu Garla, MDJackson, MS 392161316175573
- Celso Gomez-Sanchez, MDJackson, MS 392161033139555
- Teresa Moll, MDJackson, MS 392161285096396
- William Nicholas, MDJackson, MS 392161871513895
- Vanessa Sandifer, MDJackson, MS 392161104002898
Common questions
What is Raymond Frederic Grenfell, MD's NPI number?
Raymond Frederic Grenfell, MD's National Provider Identifier (NPI) is 1780899922, issued on May 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Raymond Frederic Grenfell, MD located?
The NPPES record lists a practice address at 971 Lakeland Dr, Jackson, MS, 39216. Phone: (601) 948-5158. Providers update this record themselves, so call before visiting.
How can I verify Raymond Frederic Grenfell, MD's license?
NPPES lists Mississippi license number 21031, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Raymond Frederic Grenfell, MD prescribe under Medicare Part D?
In 2024, Raymond Frederic Grenfell, MD had 11,656 Medicare Part D claims for 874 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Raymond Frederic Grenfell, MD's MIPS final score?
The 2023 MIPS final score is 87.6 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.