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Family Practice

Gerardo Lopez Mejia, MD

Sees patients in Oklahoma City, OK · Edmond, OK · Oklahoma

Summary

Dr. Gerardo Lopez Mejia, MD is a family doctor at 12220 N Macarthur Blvd D, Mercy Gohealth Urgent Care NW Okc, Oklahoma City, OK 73162. Phone: (405) 437-1100. Accepts Medicare assignment. In 2024, Gerardo Lopez Mejia had 598 Original Medicare patients and 1,319 services. NPI 1003956624. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Family doctor (Medicare lists Family Practice)
  • Address: 12220 N Macarthur Blvd D, Mercy Gohealth Urgent Care NW Okc, Oklahoma City, OK 73162 · Directions (1 more location)
  • Phone: (405) 437‑1100
  • Medicare: Accepts Medicare assignment
  • Group practice: Mercy Oklahoma Ambulatory Services LLC
  • Medical school: University Of Oklahoma College Of Medicine · graduated 2006 (20 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Gerardo Lopez Mejia, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Gerardo Lopez Mejia accept Medicare assignment?
Yes. Medicare's clinician data says Gerardo Lopez Mejia accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Gerardo Lopez Mejia see?
In 2024, CMS data shows 598 Original Medicare patients and 1,319 services for Gerardo Lopez Mejia. This counts Original Medicare only and measures volume, not quality.
What is Gerardo Lopez Mejia's NPI number?
1003956624. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Gerardo Lopez Mejia, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients598
Services billed to Medicare1,319
Different services or procedures48
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)310 services
  2. Detection test by immunoassay with direct visual observation for influenza virus (87804)176 services
  3. Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (87811)174 services
  4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)126 services
  5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)109 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol74%
  • High blood pressure71%
  • Arthritis53%
  • Ischemic heart disease28%
  • Chronic kidney disease24%
  • Depression23%

Practice locations

Addresses where Gerardo Lopez Mejia is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Gerardo Lopez Mejia as a member of this group (CMS data updated October 2, 2026).

  • Mercy Oklahoma Ambulatory Services LLC48 clinicians in the group

Specialties

Find other Family Practice doctors in Oklahoma →

Other family doctors in Oklahoma City

Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.

All family doctors in Oklahoma City →

Other clinicians in Mercy Oklahoma Ambulatory Services LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Oklahoma College Of Medicine
Graduation year2006 (20 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1003956624
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians