Mark Steven Costello, M.D.
Otolaryngology Physician · Charleston, SC
Mark Steven Costello, M.D. is an otolaryngology physician with a practice address in Charleston, South Carolina, and NPI 1497103550, issued on May 31, 2016. Check the license (South Carolina MMD.39504 LL, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark Steven Costello
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- MMD.39504 LL SC
Self-reported in NPPES; status is on the state search - Practice location
- 169 Ashley Ave, Charleston, SC 29425
- Phone
- (843) 792-8299
- Enumerated
- May 31, 2016
- Record last updated
- May 31, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210621002669); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 197 in South Carolina → Look up another NPI →
Also registered at 169 Ashley Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ahmad Aleisa, MDInternal Medicine Physician1043735095
- Biff Alexander, MDPsychiatry Physician1619893641
- Margaret Allen, MDPediatrics Physician1598505026
Verify Mark Steven Costello in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license MMD.39504 LLCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average otolaryngology physician in 2024
670 Medicare Part D claims for 280 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 15 claims were for opioids.
Most prescribed
- Fluticasone Propionate148 claims
- Famotidine50 claims
- Pantoprazole Sodium46 claims
- Ipratropium Bromide45 claims
- Amoxicillin44 claims
- Azelastine Hcl39 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): 92.5 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: $28.30
2 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 6,429 providers of this specialty with any payment received $1,922.50 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
- Christ Hospital Medical Specialists LLCFt Wright, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Steven Costello among 197 otolaryngology physician records in South Carolina
Mark Steven Costello, M.D. is one of 197 otolaryngology physician records with a practice address in South Carolina. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 69% of them.
- NPI issued2016 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2016 · median 2005 among the 126 with a school on file
- Record last updated2016 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in South Carolina
There are 197 otolaryngology physician records in South Carolina.
All 197 in South Carolina → Every provider in Charleston → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Terrence Day, MDCharleston, SC 294251659484608
- Daniel Gallagher, MDCharleston, SC 294251235219916
- Lucinda Halstead, MDCharleston, SC 294251386757342
- Mark Hoy, MDCharleston, SC 294251417060039
- Robert Labadie, MDCharleston, SC 294251710074851
- Paul Lambert, MDCharleston, SC 294251881707412
- Ted Meyer, MDCharleston, SC 294251093821399
- Jason Newman, MDCharleston, SC 294251356378251
Common questions
What is Mark Steven Costello, M.D.'s NPI number?
Mark Steven Costello, M.D.'s National Provider Identifier (NPI) is 1497103550, issued on May 31, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark Steven Costello, M.D. located?
The NPPES record lists a practice address at 169 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-8299. Providers update this record themselves, so call before visiting.
How can I verify Mark Steven Costello, M.D.'s license?
NPPES lists South Carolina license number MMD.39504 LL, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Steven Costello, M.D. prescribe under Medicare Part D?
In 2024, Mark Steven Costello, M.D. had 670 Medicare Part D claims for 280 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Mark Steven Costello, M.D.'s MIPS final score?
The 2023 MIPS final score is 92.5 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.