Guy Scott Mullin, M.D.
Ophthalmology Physician · Langhorne, PA
Guy Scott Mullin, M.D. is an ophthalmology physician with a practice address in Langhorne, Pennsylvania, and NPI 1285680157, issued on May 25, 2006. Check the license (Pennsylvania MD-058636L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Guy Scott Mullin
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- MD-058636L PA
MA-64061 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 409 Executive Dr, Langhorne, PA 19047
- Phone
- (215) 860-3400
- Enumerated
- May 25, 2006
- Record last updated
- Dec 1, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (215) 860-8779
- Medicare enrollment
- Enrolled (PECOS I20111122000592); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,088 in Pennsylvania → Look up another NPI →
Also registered at 409 Executive Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michelle Townsend-Mullin, O.D.Optometrist1851344972
Verify Guy Scott Mullin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD-058636LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average ophthalmology physician in 2024
944 Medicare Part D claims for 260 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Prednisolone Acetate257 claims
- Latanoprost200 claims
- Gatifloxacin85 claims
- Timolol Maleate73 claims
- Atropine Sulfate67 claims
- Erythromycin39 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): 91.6 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).
Bills Medicare through one group practice
- Newtown Laser And Eye InstituteLanghorne, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guy Scott Mullin among 1,088 ophthalmology physician records in Pennsylvania
Guy Scott Mullin, M.D. is one of 1,088 ophthalmology physician records with a practice address in Pennsylvania. 81% 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 22% of them.
- NPI issued2006 · 22% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1992 · median 2000 among the 734 with a school on file
- Record last updated2016 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Pennsylvania
There are 1,088 ophthalmology physician records in Pennsylvania.
All 1,088 in Pennsylvania → Every provider in Langhorne → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Blair Armstrong, M.D.Langhorne, PA 190471033406210
- Bing Chiu, M.D.Langhorne, PA 190471720473689
- Jay Friedberg, M.D.Langhorne, PA 190471912960139
- Sadeer Hannush, M.D.Langhorne, PA 190471780637942
- Stuart Hirsch, M.D.Langhorne, PA 190471588761944
- Lindsay Machen, M.D.Langhorne, PA 190471649667452
- Sagun Pendse, MDLanghorne, PA 190471295788941
- Edward Poole, M.D.Langhorne, PA 190471952408312
Common questions
What is Guy Scott Mullin, M.D.'s NPI number?
Guy Scott Mullin, M.D.'s National Provider Identifier (NPI) is 1285680157, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Guy Scott Mullin, M.D. located?
The NPPES record lists a practice address at 409 Executive Dr, Langhorne, PA, 19047. Phone: (215) 860-3400. Providers update this record themselves, so call before visiting.
How can I verify Guy Scott Mullin, M.D.'s license?
NPPES lists Pennsylvania license number MD-058636L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Guy Scott Mullin, M.D. prescribe under Medicare Part D?
In 2024, Guy Scott Mullin, M.D. had 944 Medicare Part D claims for 260 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Guy Scott Mullin, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.6 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.