DR. HAROLD O. GAINES (M.D.) – Emergency Medicine Physician, NPI 1255328811

DR. HAROLD O. GAINES (M.D.) is a healthcare provider. based in Bowie, Maryland. specializing in EMERGENCY MEDICINE. They hold the professional credentials M.D.. They hold a License No. D0044230 (MD). The NPI Number for DR. HAROLD O. GAINES (M.D.) is 1255328811

Main info

Male
39 Years Of Experience
Accepts Medicare Assignment
Name
DR. HAROLD O. GAINES (M.D.)
NPI
1255328811
Phone
(301) 352-0980
Address
3836 EARLY GLOW LN
Enumeration Date
29 September 2005
Last Update Date
20 March 2020

Doctor Profile

Medical School Name
STATE UNIVERSITY OF NEW YORK AT BUFFALO SCHOOL OF MEDICINE
Secondary Phone
3016094474
Graduation Year
1987 (39 years ago)
PAC ID
8325094899
Group Practice PAC ID
8123257821
Professional Enrollment ID
I20050328000856
Address ID
MD206465960LA5XXXXAVEX300
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience73
Completeness75
Years active:20State licenses:2Digital endpointsOther names

988 EMERGENCY MEDICINE in MD

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Provider Addresses for DR. HAROLD O. GAINES (M.D.)

  • 3836, Early Glow Lane, Pin Oak Village, Bowie Town Center, Bowie, Prince George's County, Maryland, 20716, United States

    BOWIE, MD 207163362

    Phone: (301) 352-0980

    Fax: (301) 609-4244

    Type: Mailing

  • 701, Charles Street, Old Colony, La Plata, Charles County, Maryland, 20646, United States

    LA PLATA, MD 206465930

    Phone: (301) 609-4000

    Fax: (301) 609-4410

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2005-03-28

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20050328000856IEmergency MedicineMDTBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
99223Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes4040$0
99291Critical care, first 30-74 minutes2424$0
View full utilization report →

Insurance plans in this area (ZIP 20716)

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Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 8123257821View full group profile
NameSpecialtyState
Critical Care (Intensivists), General SurgeryMD
Internal Medicine, Critical Care (Intensivists), Pulmonary Disease, Critical Care (Intensivists)NC
Critical Care (Intensivists), Internal MedicineNJ
Critical Care (Intensivists)NC
-MD
General SurgeryMI
Nurse PractitionerDC
-MD
Critical Care (Intensivists)VA
-VA

Reviews

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Frequently asked questions

How do payers reference DR. HAROLD O. GAINES (M.D.)?
For DR. HAROLD O. GAINES (M.D.), use NPI 1255328811 as the unique 10-digit identifier.
Is there an active status for DR. HAROLD O. GAINES (M.D.)?
For scheduling context, DR. HAROLD O. GAINES (M.D.) is shown as active in the registry.
How would a patient describe DR. HAROLD O. GAINES (M.D.)'s focus?
For DR. HAROLD O. GAINES (M.D.), the primary taxonomy reads as Emergency Medicine Physician. Clinical services aligned with this taxonomy classification.
Is DR. HAROLD O. GAINES (M.D.) associated with Bowie?
Public fields place DR. HAROLD O. GAINES (M.D.) around Bowie, Maryland. Always confirm the exact site before visiting.
What does 2 location(s) imply?
2 practice locations appear in the available data.

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