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DR. GAGANDEEP SINGH GREWAL M.D.
NPI 1114214038
Internal Medicine in Hattiesburg, MS

Active since June 29, 2011PECOS EnrolledAccepts Medicare Assignment
89.76/100
CMS Quality Rating
5001 HARDY ST, HATTIESBURG, MS 39402(601) 296-2090(601) 296-2089 Get Directions Write a Review

NPPES record last updated: October 8, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 8, 2020, Mar 22, 2018, Oct 27, 2016 (3 updates tracked since 2016).

About Dr. Gagandeep Singh Grewal M.d. NPPES

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

DR. GAGANDEEP SINGH GREWAL M.D. (NPI 1114214038) is an individual internal medicine provider in Hattiesburg, Mississippi, licensed in Mississippi (23236) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, is affiliated with Merit Health Wesley, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1114214038
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GAGANDEEP SINGH GREWALCredential: M.D.
Location Address5001 HARDY STHattiesburg, MS 39402-1308
Mailing Address5001 Hardy StHattiesburg, MS 39402-1308 · (601) 296-2090 · Fax (601) 296-2089
Phone(601) 296-2090
Fax(601) 296-2089
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateJune 29, 2011
Last NPPES UpdateOctober 8, 20203 updates tracked since enumeration
NPPES CertifiedOctober 8, 2020
✔ NPI 1114214038 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in MS · 23236✔ Licensed in MS · 10170
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
5001 HARDY ST, Hattiesburg, MS 39402
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Other Identifiers 1

Medicaid01888564MS

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gagandeep Singh Grewal M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4688892029
PECOS Enrollment IDI20140827001778
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 Gagandeep Grewal reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hattiesburg Hb Medical Services LLC
Same address
Emergency Medicine
5001 HARDY ST
Hattiesburg, MS 39402
  • Reassigned Medicare billing, Mississippi enrollment
  • 50 clinicians in this Medicare group
NPI 1699456376 (601) 296-2090
Wesley Physician Services LLC
0.1 mi
Family Medicine
5003 HARDY ST STE 200
Hattiesburg, MS 39402
  • Reassigned Medicare billing, Mississippi enrollment
  • 86 clinicians in this Medicare group
NPI 1538200209 (601) 261-5700

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 8

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
694 services242 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
200 services181 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
146 services55 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
134 services127 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
49 services40 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
48 services46 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Merit Health Wesley

Acute Care Hospitals · Hattiesburg, MS
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number250094
Location5001 W Hardy StHattiesburg, MS 39402 · Lamar County
Emergency services Birthing friendly

Highland Community Hospital

Acute Care Hospitals · Picayune, MS
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number250117
Location130 Highland PkwyPicayune, MS 39466 · Pearl River County
Emergency services Birthing friendly

Pearl River County Hospital

Critical Access Hospitals · Poplarville, MS
OwnershipGovernment - Local
CMS Certification Number251333
Location305 West Moody StreetPoplarville, MS 39470 · Pearl River County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 39402 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
$120.41 typical visit price
range $51.65 – $159.18
Typical copayment $30.10 (range $12.91 – $39.79)
Most-billed visit code 99204
Established Patient
$92.20 typical visit price
range $16.15 – $129.61
Typical copayment $23.05 (range $4.03 – $32.40)
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.

89.76/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality75.59
Promoting Interoperability100
Improvement Activities40

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
4 suppliers91 claims92 services$17.50 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
3 suppliers12 claims12 services$6.14 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
4 suppliers91 claims92 services$89.27 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
4 suppliers24 claims29 services$24.47 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

BLAKE EDWIN BOLEWARE
Student in an Organized Health Care Education/Training Program
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 268-8000
RIVER PHYSICIANS GROUP LLC
Emergency Medicine
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (770) 874-5439
BRADLEY WILLIAMS DO
Emergency Medicine
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 296-3963
MIJU YU KURTZWEIL D.O.
Emergency Medicine
5001 HARDY ST, MERIT HEALTH WESLEY
HATTIESBURG, MS 39402
Lamar County (601) 296-3963
ANNETTE LONGO MD
Emergency Medicine
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 268-8000
RUBY MCCULLOUGH HOPKINS MD
Student in an Organized Health Care Education/Training Program
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 268-8000
ALEX GAUTHIER
Internal Medicine
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 268-8000
WESLEY HEALTH SYSTEM LLC
Psychiatric Unit
5001 HARDY ST
HATTIESBURG, MS 39402
Lamar County (601) 268-8000

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 Gagandeep Grewal's NPI number?

The NPI number for Gagandeep Grewal is 1114214038. It was assigned to this individual provider in the NPPES registry on June 29, 2011.

Where is Gagandeep Grewal located?

Gagandeep Grewal practices at 5001 Hardy St, Hattiesburg, MS 39402. The listed phone number is (601) 296-2090.

What is Gagandeep Grewal's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gagandeep Grewal enrolled in Medicare?

Yes. Gagandeep Grewal is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Gagandeep Grewal's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gagandeep Grewal reassigns Medicare benefits to 2 organizations: Hattiesburg Hb Medical Services LLC (Hattiesburg, MS) and Wesley Physician Services LLC (Hattiesburg, MS). 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 Gagandeep Grewal's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gagandeep Grewal accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 1 other insurer list Gagandeep Grewal as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gagandeep Grewal affiliated with any hospitals?

According to CMS data, Gagandeep Grewal is affiliated with Merit Health Wesley, Highland Community Hospital and Pearl River County Hospital.

When was this NPI record last updated?

The NPPES record for Gagandeep Grewal was last updated on October 8, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.