Marcus George Connelly, MD
Dermatology Physician · Modesto, CA
Marcus George Connelly, MD is a dermatology physician with a practice address in Modesto, California, and NPI 1295703577, issued on Mar 10, 2006. Check the license (California C50251, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marcus George Connelly
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- C50251 CA
Self-reported in NPPES; status is on the state search - Practice location
- 600 Coffee RD, Modesto, CA 95355
- Phone
- (209) 521-6097
- Enumerated
- Mar 10, 2006
- Record last updated
- Nov 1, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 00C502510 CA
- Medicare enrollment
- Enrolled (PECOS I20050811001160); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 600 Coffee RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marcus George Connelly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C50251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average dermatology physician in 2024
1,291 Medicare Part D claims for 462 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Fluocinonide144 claims
- Triamcinolone Acetonide143 claims
- Fluorouracil89 claims
- Hydrocortisone82 claims
- Alclometasone Dipropionate65 claims
- Desonide55 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: $2,191.08
62 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 10,250 providers of this specialty with any payment received $8,544.61 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
- Sutter Valley Medical FoundationSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcus George Connelly among 2,083 dermatology physician records in California
Marcus George Connelly, MD is one of 2,083 dermatology physician records with a practice address in California. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1980 · median 2006 among the 1,450 with a school on file
- Record last updated2016 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Modesto → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Byron Knowles, M.D., PH.D.Modesto, CA 953551225586662
- Lily Park, D.O.Modesto, CA 953551124333455
- Thomas Salopek, MDModesto, CA 953551114983210
- Gary Wagner, M.D.Modesto, CA 953551235160102
- Michael Zang, M.D.Modesto, CA 953551528026358
- Thomas Hall, MDModesto, CA 953561770570814
- Blake Alexander, M.D.Modesto, CA 953501033132170
- Catherine Biren, M.D.Modesto, CA 953501124021035
Common questions
What is Marcus George Connelly, MD's NPI number?
Marcus George Connelly, MD's National Provider Identifier (NPI) is 1295703577, issued on Mar 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marcus George Connelly, MD located?
The NPPES record lists a practice address at 600 Coffee RD, Modesto, CA, 95355. Phone: (209) 521-6097. Providers update this record themselves, so call before visiting.
How can I verify Marcus George Connelly, MD's license?
NPPES lists California license number C50251, 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 Marcus George Connelly, MD prescribe under Medicare Part D?
In 2024, Marcus George Connelly, MD had 1,291 Medicare Part D claims for 462 beneficiaries; the average among dermatology physician prescribers was 797. 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.