Gillian Claire Ditton, M.D.
Endocrinology, Diabetes & Metabolism Physician · Longmont, CO
Gillian Claire Ditton, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Longmont, Colorado, and NPI 1891174801, issued on May 22, 2015. Check the license (Colorado DR.0064019, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gillian Claire Ditton
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- DR.0064019 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1925 Mountain View Ave, Longmont, CO 80501
- Phone
- (720) 494-3119
- Enumerated
- May 22, 2015
- Record last updated
- Jul 27, 2026
- Fax
- (720) 718-0952
- Medicare enrollment
- Enrolled (PECOS I20200727000326); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 149 in Colorado → Look up another NPI →
Also registered at 1925 Mountain View Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Peter Bachmann, MDDermatology Physician1992702161
- Katrina Bailey, PA-CPhysician Assistant1518177096
- Lauren Baloy, APRNNurse Practitioner1871000638
- Jill BayouthRegistered Dietetic Technician1992180939
- Jessica Birch, MDOtolaryngology Physician1578976627
Verify Gillian Claire Ditton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0064019Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,967 Medicare Part D claims for 376 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 62% of claims.
Most prescribed
- Mounjaro362 claims
- Levothyroxine Sodium281 claims
- Trulicity217 claims
- Jardiance186 claims
- Metformin Hcl Er183 claims
- Ozempic151 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: $188.16
7 payments; by number, the most common kind was food and beverage; the largest payer was Tandem Diabetes Care, Inc. 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
- Boulder Medical Center, PCBoulder, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gillian Claire Ditton among 149 endocrinology, diabetes & metabolism physician records in Colorado
Gillian Claire Ditton, M.D. is one of 149 endocrinology, diabetes & metabolism physician records with a practice address in Colorado. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 87% of them.
- NPI issued2015 · 87% of these records are older, 9% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2015 · median 2002 among the 106 with a school on file
- Record last updated2026 · 62% 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 Colorado 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 Colorado
There are 149 endocrinology, diabetes & metabolism physician records in Colorado.
All 149 in Colorado → Every provider in Longmont → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Iratxe Eskurza Garcia, MDLongmont, CO 805011801033295
- David Podlecki, MDLongmont, CO 805011649277815
- Leila Wing, M.D.Longmont, CO 805011699972752
- Jessica Devin, MDSteamboat Springs, CO 804871063569945
- Barbara Widom, M.D.Fort Collins, CO 805251669480810
- Meriam Izon, M.D.Fort Collins, CO 805281093723231
- Polina Kaloyanova, MDFort Collins, CO 805281073707667
- Alejandro Munoz, M.D.Fort Collins, CO 805281568639391
Common questions
What is Gillian Claire Ditton, M.D.'s NPI number?
Gillian Claire Ditton, M.D.'s National Provider Identifier (NPI) is 1891174801, issued on May 22, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Gillian Claire Ditton, M.D. located?
The NPPES record lists a practice address at 1925 Mountain View Ave, Longmont, CO, 80501. Phone: (720) 494-3119. Providers update this record themselves, so call before visiting.
How can I verify Gillian Claire Ditton, M.D.'s license?
NPPES lists Colorado license number DR.0064019, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gillian Claire Ditton, M.D. prescribe under Medicare Part D?
In 2024, Gillian Claire Ditton, M.D. had 2,967 Medicare Part D claims for 376 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.