Joel Marc C. Rubio, MD
Endocrinology, Diabetes & Metabolism Physician · Dededo, GU
Joel Marc C. Rubio, MD is an endocrinology, diabetes & metabolism physician with a practice address in Dededo, Guam, and NPI 1639289499, issued on Aug 30, 2006. Check the license (Guam M-1251, as entered in NPPES) with the Guam board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joel Marc C. Rubio
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- M-1251 GU
Self-reported in NPPES; status is on the state search - Practice location
- 133 Route 3, Dededo, GU 96929
- Phone
- (671) 645-5500
- Enumerated
- Aug 30, 2006
- Record last updated
- Feb 1, 2026
- Medicare enrollment
- Enrolled (PECOS I20040113000424); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1985
- Entity
- Type 1 · individual
1 nearest endocrinology, diabetes & metabolism physician record → All 2 in Guam → Look up another NPI →
Also registered at 133 Route 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joel Marc C. Rubio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Guam board licenses this profession
Search for license M-1251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,016 Medicare Part D claims for 73 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Levothyroxine Sodium102 claims
- Trulicity65 claims
- Lantus Solostar60 claims
- Jardiance52 claims
- Pioglitazone Hcl48 claims
- Metformin Hcl46 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $17.98
1 payment: food and beverage; the largest payer was Amgen 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
- Guam Healthcare Development IncorporatedDededo, GU
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Guam
There are 2 endocrinology, diabetes & metabolism physician records in Guam.
All 2 in Guam → Every provider in Dededo → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 1 endocrinology, diabetes & metabolism physician record with the nearest ZIP codes
- Erika Alford, MDTamuning, GU 969131043403447
Common questions
What is Joel Marc C. Rubio, MD's NPI number?
Joel Marc C. Rubio, MD's National Provider Identifier (NPI) is 1639289499, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joel Marc C. Rubio, MD located?
The NPPES record lists a practice address at 133 Route 3, Dededo, GU, 96929. Phone: (671) 645-5500. Providers update this record themselves, so call before visiting.
How can I verify Joel Marc C. Rubio, MD's license?
NPPES lists Guam license number M-1251, as entered by the provider. Search the Guam board that licenses this profession; the NPPES record confirms identity only.
How much does Joel Marc C. Rubio, MD prescribe under Medicare Part D?
In 2024, Joel Marc C. Rubio, MD had 1,016 Medicare Part D claims for 73 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Joel Marc C. Rubio, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.