DR. DAVID MILLARD RIMMER III M.D.
NPI 1619976636
Specialist in Bay St Louis, MS

Q: What is David Rimmer's NPI number?

The NPI number for David Rimmer is 1619976636. It was assigned to this individual provider in the NPPES registry on July 20, 2005.

Q: What is David Rimmer's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for David Rimmer was last updated on February 18, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since July 20, 2005PECOS EnrolledAccepts Medicare Assignment

202C DRINKWATER RD, BAY ST LOUIS, MS 39520(228) 463-8939(228) 463-8938 Get Directions Write a Review

NPPES record last updated: February 18, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. David Millard Rimmer Iii M.d. NPPES

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

DR. DAVID MILLARD RIMMER III M.D. (NPI 1619976636) is an individual specialist in Bay St Louis, Mississippi, licensed in Mississippi (18097) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital At Gulfport, and is a graduate of Louisiana State University School Of Medicine In Shreveport (1997).

NPPES Registry Identity

NPI1619976636

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. DAVID MILLARD RIMMER IIICredential: M.D.

Location Address202C DRINKWATER RDBay St Louis, MS 39520-1638

Mailing Address149 Drinkwater RdBay St.louis, MS 39520-1614 · (228) 463-8939 · Fax (228) 463-8938

Phone(228) 463-8939

Fax(228) 463-8938

Sole ProprietorNo

Medical School CMSLouisiana State University School Of Medicine In ShreveportGraduated 1997

Enumeration DateJuly 20, 2005

Last NPPES UpdateFebruary 18, 2014

✔ NPI 1619976636 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in MS · 18097

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

202C DRINKWATER RD, Bay St Louis, MS 39520

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Other Identifiers 4

Medicare UPINH20649MS

Medicaid03504366MS

Medicare PIN20000509MS

Medicare PIN302I025544MS

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. David Millard Rimmer Iii 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 ID9335116169

PECOS Enrollment IDI20040916000457, I20080630000193

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

Medicare enrollment records show David Rimmer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Memorial Hospital At Gulfport

0.2 mi

Internal Medicine

835 THAMES AVE
Bay St Louis, MS 39520

Reassigned Medicare billing, Mississippi enrollment
731 clinicians in this Medicare group

NPI 1518394089 (228) 466-4977

Saint Francis Medical Center

445 mi

Clinic/Center

402 N WASHINGTON ST
East Prairie, MO 63845

Reassigned Medicare billing, Missouri enrollment
595 clinicians in this Medicare group

NPI 1306305222 (573) 649-3026

Mercy Clinic Springfield Communities

523 mi

Family Medicine

3231 S NATIONAL AVE STE 220
Springfield, MO 65807

Reassigned Medicare billing, Missouri enrollment
1,565 clinicians in this Medicare group

NPI 1245277631 (855) 420-7900

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 13

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.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

76 services76 patients

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.

49 services33 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.

34 services34 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.

32 services27 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.

26 services26 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

24 services24 patients

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.

23 services21 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

20 services20 patients

Removal of gallbladder using an endoscope 47562

This procedure, known as endoscopic gallbladder removal, involves a surgeon using a special tool called an endoscope to remove your gallbladder through small incisions. It's typically done to treat gallstones and related complications. It's a less invasive method, often leading to quicker recovery.

14 services14 patients

Repair of groin hernia using an endoscope 49650

This procedure involves the use of an endoscope, a thin tube with a camera, to repair a hernia in the groin area. The surgeon makes small incisions, inserts the endoscope, and uses special tools to fix the hernia. This minimally invasive technique often results in quicker recovery times.

14 services14 patients

Insertion of stomach tube using a flexible endoscope 43246

This procedure involves the use of a flexible endoscope, a thin tube with a light and camera, to insert a stomach tube. It helps doctors view and access your stomach without surgery. It's typically performed under sedation to ensure comfort.

12 services12 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

12 services12 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

12 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Memorial Hospital At Gulfport

Acute Care Hospitals · Gulfport, MS

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number250019

Location4500 13th StreetGulfport, MS 39502 · Harrison County

Emergency services Birthing friendly

Saint Francis Medical Center

Acute Care Hospitals · Cape Girardeau, MO

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260183

Location211 St Francis DrCape Girardeau, MO 63703 · Cape Girardeau County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES

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

MEGAN M WISSING NP

Nurse Practitioner (Family)

202C DRINKWATER RD
BAY ST LOUIS, MS 39520

Hancock County (228) 678-1211

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 David Rimmer's NPI number?

The NPI number for David Rimmer is 1619976636. It was assigned to this individual provider in the NPPES registry on July 20, 2005.

Where is David Rimmer located?

David Rimmer practices at 202C Drinkwater Rd, Bay St Louis, MS 39520. The listed phone number is (228) 463-8939.

What is David Rimmer's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is David Rimmer enrolled in Medicare?

Yes. David Rimmer 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 David Rimmer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Rimmer reassigns Medicare benefits to 3 organizations: Memorial Hospital At Gulfport (Bay St Louis, MS), Saint Francis Medical Center (East Prairie, MO) and Mercy Clinic Springfield Communities (Springfield, MO). 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 David Rimmer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Rimmer accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 5 other insurers list David Rimmer 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 David Rimmer affiliated with any hospitals?

According to CMS data, David Rimmer is affiliated with Memorial Hospital At Gulfport and Saint Francis Medical Center.

When was this NPI record last updated?

The NPPES record for David Rimmer was last updated on February 18, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.