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MRS. MARY T. GRIMM M.D.
NPI 1699866558
Obstetrics & Gynecology in Chesterfield, MO

Active since September 27, 2006PECOS Enrolled
226 S WOODS MILL RD, SUITE 60 WEST, CHESTERFIELD, MO 63017(314) 878-7333(314) 878-7453 Get Directions Write a Review

NPPES record last updated: December 28, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 28, 2021, Nov 14, 2018 (2 updates tracked since 2018).

About Mrs. Mary T. Grimm M.d. NPPES

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

MRS. MARY T. GRIMM M.D. (NPI 1699866558) is an individual obstetrics & gynecology provider in Chesterfield, Missouri, licensed in Missouri (MDR7P90) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1699866558
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMRS. MARY T. GRIMMCredential: M.D.
Location Address226 S WOODS MILL RD, SUITE 60 WESTChesterfield, MO 63017-3662
Mailing Address226 S Woods Mill Rd, Suite 60 WestChesterfield, MO 63017-3662 · (314) 878-7333 · Fax (314) 878-7453
Phone(314) 878-7333
Fax(314) 878-7453
Sole ProprietorYes
Enumeration DateSeptember 27, 2006
Last NPPES UpdateDecember 28, 20212 updates tracked since enumeration
NPPES CertifiedMarch 30, 2021
✔ NPI 1699866558 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MO · MDR7P90
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
226 S WOODS MILL RD, Chesterfield, MO 63017
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Other Names 1

Former Name (1)Ms. Mary T. Kayser M.d.

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Mary T. Grimm 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 Reassignment

Medicare enrollment records show Mary Grimm reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Associates In Womens Healthcare
0.7 mi
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 60 WEST
Chesterfield, MO 63017
  • Reassigned Medicare billing, Missouri enrollment
  • 2 clinicians in this Medicare group
NPI 1831276674 (314) 878-7333

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 5

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.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
132 services132 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.
108 services90 patients
Dxa bone density measurement of hip, pelvis, spine 77080
A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.
27 services27 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
26 services26 patients
Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830
An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.
12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63017 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MORLEY & MAXSON, MDS, PC
Obstetrics & Gynecology
226 S WOODS MILL RD, 55W
CHESTERFIELD, MO 63017
St. Louis County (314) 469-0001
DR. KATHERINE L KOMENDOWSKI MD
Pediatrics
226 S WOODS MILL RD, STE 36W
CHESTERFIELD, MO 63017
St. Louis County (314) 453-9666
JOHN C. PERLMUTTER, INC.
Ophthalmology
226 S WOODS MILL RD, SUITE 51 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 434-0202
DAVID H CORT M.D.
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 434-2399
WUCA - WOODSMILL LLC
Clinic/Center (Multi-Specialty)
226 S WOODS MILL RD, SUITE 36W
CHESTERFIELD, MO 63017
St. Louis County (314) 453-9666
DR. CAROLINE ANNE MORGAN M.D.
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 68 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 576-0930
DR. CHRISTOPHER S. CRONIN M.D.
Surgery
226 S WOODS MILL RD, SUITE 49 W
CHESTERFIELD, MO 63017
St. Louis County (314) 434-1211
DR. STEPHEN C YIM MD
Obstetrics & Gynecology (Gynecology)
226 S WOODS MILL RD, SUITE 55 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 469-4440

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 Mary Grimm's NPI number?

The NPI number for Mary Grimm is 1699866558. It was assigned to this individual provider in the NPPES registry on September 27, 2006. The provider is also known as Ms. Mary T. Kayser M.D..

Where is Mary Grimm located?

Mary Grimm practices at 226 S Woods Mill Rd Suite 60 West, Chesterfield, MO 63017. The listed phone number is (314) 878-7333.

What is Mary Grimm's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mary Grimm enrolled in Medicare?

Yes. Mary Grimm is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mary Grimm's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Grimm reassigns Medicare benefits to Associates In Womens Healthcare (Chesterfield, MO). The 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 Mary Grimm's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Grimm accept?

Health plans from Medica list Mary Grimm 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.

When was this NPI record last updated?

The NPPES record for Mary Grimm was last updated on December 28, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.