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DR. RONALD EDWARD GREGER M.D.
NPI 1922093723
Family Medicine - Adult Medicine in Gaithersburg, MD

Active since September 18, 2005PECOS Enrolled
80.17/100
CMS Quality Rating
201 RUSSELL AVE, GAITHERSBURG, MD 20877(301) 216-4157(301) 987-6297 Get Directions Write a Review

NPPES record last updated: October 4, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Ronald Edward Greger M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RONALD EDWARD GREGER M.D. (NPI 1922093723) is an individual adult medicine provider in Gaithersburg, Maryland, licensed in Maryland (D0014660) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922093723
Entity TypeIndividualMale
Primary Taxonomy207QA0505X
Provider Legal NameDR. RONALD EDWARD GREGERCredential: M.D.
Location Address201 RUSSELL AVEGaithersburg, MD 20877-2800
Mailing Address201 Russell AveGaithersburg, MD 20877-2800 · (301) 216-4157 · Fax (301) 987-6297
Phone(301) 216-4157
Fax(301) 987-6297
Sole ProprietorNo
Enumeration DateSeptember 18, 2005
Last NPPES UpdateOctober 4, 2011
✔ NPI 1922093723 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Adult MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QA0505X
License✔ Licensed in MD · D0014660
Definition
The National Uniform Claim Committee (NUCC) recommends code 207QA0505X not be used. Choose a more appropriate code.
201 RUSSELL AVE, Gaithersburg, MD 20877
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Other Identifiers 4

Medicaid410467600MD
Medicare PING00680MD
Other211854MD · Medicare
Medicare UPINC62064MD

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ronald Edward Greger M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Ronald Greger reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Medstar Urgent Care, LLC
10 mi
Urgent Care
11915 GEORGIA AVE
Wheaton, MD 20902
  • Reassigned Medicare billing, District of Columbia and Maryland enrollments
  • 309 clinicians in this Medicare group
NPI 1871843409 (301) 942-4505
Medstar Medical Group II LLC
17 mi
Critical Care Medicine
3800 RESERVOIR RD NW
Washington, DC 20007
  • Reassigned Medicare billing, District of Columbia and Maryland enrollments
  • Also billed through NPI 1376887844 (Maryland)
  • 3,530 clinicians in this Medicare group
NPI 1205562816 (703) 558-1403

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
21 services18 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
13 services13 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20877 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80.17/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality76.69
Promoting Interoperability100
Improvement Activities40
Cost53.49

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. KAREN FRIAS WYSON MPT
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 987-6170
REHAB 1ST, INC.
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 987-6170
TAMILSELVI PALANISAMY PAYIRAN PT
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 987-6170
SRUTHI MAREEDU
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 216-4001
KATHRYN HAMILTON PT
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 216-4001
HAIZIA LAMIA AMSLER M.D.
Internal Medicine
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 557-2110
MRS. SHERRI J LAMOTHE PT
Physical Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 987-6170
MR. STEVEN P GIANNOTTI OTR/L
Occupational Therapist
201 RUSSELL AVE
GAITHERSBURG, MD 20877
Montgomery County (301) 987-6170

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronald Greger's NPI number?

The NPI number for Ronald Greger is 1922093723. It was assigned to this individual provider in the NPPES registry on September 18, 2005.

Where is Ronald Greger located?

Ronald Greger practices at 201 Russell Ave, Gaithersburg, MD 20877. The listed phone number is (301) 216-4157.

What is Ronald Greger's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Adult Medicine, with taxonomy code 207QA0505X.

Is Ronald Greger enrolled in Medicare?

Yes. Ronald Greger is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Ronald Greger's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Greger reassigns Medicare benefits to 2 organizations: Medstar Urgent Care, LLC (Wheaton, MD) and Medstar Medical Group II LLC (Washington, DC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ronald Greger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ronald Greger was last updated on October 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.