NPPES file of Aug 9, 2026

Marissa Lewis, M.D.

Emergency Medicine Physician · Saint Louis, MO

Marissa Lewis, M.D. is an emergency medicine physician with a practice address in Saint Louis, Missouri, and NPI 1164874822, issued on Jul 6, 2016. Check the license (Missouri 2019016334, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1164874822
Name
Marissa Lewis
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
2019016334 MO
Self-reported in NPPES; status is on the state search
Practice location
660 S Euclid Ave, Saint Louis, MO 63110
Phone
(314) 747-4156
Enumerated
Jul 6, 2016
Record last updated
Oct 25, 2023
Medicare enrollment
Enrolled (PECOS I20200529001912); accepts Medicare assignment
Medical or professional school
Medical College Of Wisconsin, 2016
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 660 S Euclid Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brooj Abro, MDHematology (Pathology) Physician1205312972
  2. Benjamin AdamsStudent in an Organized Health Care Education/Training Program1275320285
  3. Loren AdlerStudent in an Organized Health Care Education/Training Program1134988488
  4. Garima Agrawal, M.D.Nuclear Medicine Physician1104132331
  5. Kelly Ahern, MDPsychiatry Physician1740178177
  6. Mueed Ahmad, M.D.Otolaryngology Physician1841329661

Verify Marissa Lewis in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2019016334
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

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60% fewer Medicare Part D claims than the average emergency medicine physician in 2024

91 Medicare Part D claims for 66 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 20 claims were for opioids.

  1. Marissa Lewis91
  2. Specialty average226

Most prescribed

  1. Hydrocodone-Acetaminophen17 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): 89.6 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.

  1. Qualityout of 100 · 30% of the final score70.5
  2. Costout of 100 · 30%100.0
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $18.26

1 payment: food and beverage; the largest payer was Csl Behring. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Marissa Lewis$18.26
  2. Specialty average$953.79

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospitals and group practices

  1. Mercy Hospital SouthSaint Louis, MO · Acute Care Hospitals2 of 5 stars
  2. Cep America LLCBridgeton, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

398 emergency medicine physician records list a practice address in Saint Louis

They are 398 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,405 emergency medicine physician records in Missouri.

Other emergency medicine physician records in Missouri

  1. Robert Abbott, M.D.Saint Charles, MO1144269267
  2. Nagla Abdelmalek, M.D.Saint Louis, MO1003847591
  3. Donald Ables, MDKansas City, MO1346222189
  4. Allison Abma, DOBranson, MO1033613302
  5. Sean Abraham, D.O.Columbia, MO1326368994
  6. Lajon Addison, D.O.Columbia, MO1104871854
  7. Adegoke Adeleke, M.D., M.S.MMountain View, MO1568753481
  8. Opeolu Adeoye, MDSaint Louis, MO1023120623
  9. Lukuman Afuwape, M.DKansas City, MO1639494412
  10. Lourdes Aguilo Rodriguez, M.D.Joplin, MO1861804056

Common questions

What is Marissa Lewis, M.D.'s NPI number?

Marissa Lewis, M.D.'s National Provider Identifier (NPI) is 1164874822, issued on Jul 6, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Marissa Lewis, M.D. located?

The NPPES record lists a practice address at 660 S Euclid Ave, Saint Louis, MO, 63110. Phone: (314) 747-4156. Providers update this record themselves, so call before visiting.

How can I verify Marissa Lewis, M.D.'s license?

NPPES lists Missouri license number 2019016334, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Marissa Lewis, M.D. prescribe under Medicare Part D?

In 2024, Marissa Lewis, M.D. had 91 Medicare Part D claims for 66 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.

What is Marissa Lewis, M.D.'s MIPS final score?

The 2023 MIPS final score is 89.6 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.