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MARGARET E. BAUM M.D.
NPI 1891724597
Obstetrics & Gynecology in Saint Louis, MO

Active since July 03, 2006PECOS Enrolled
2220 LEMP AVE, SAINT LOUIS, MO 63104(314) 898-1700(314) 814-8542 Get Directions Write a Review

NPPES record last updated: August 31, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Margaret E. Baum M.d. NPPES

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

MARGARET E. BAUM M.D. (NPI 1891724597) is an individual obstetrics & gynecology provider in Saint Louis, Missouri, licensed in Missouri (2004036069) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891724597
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMARGARET E. BAUMCredential: M.D.
Location Address2220 LEMP AVESaint Louis, MO 63104-2700
Mailing Address1717 Biddle StSaint Louis, MO 63106-3454 · (314) 898-1700 · Fax (314) 814-8542
Phone(314) 898-1700
Fax(314) 814-8542
Sole ProprietorNo
Enumeration DateJuly 3, 2006
Last NPPES UpdateAugust 31, 2016
✔ NPI 1891724597 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 · 2004036069
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.
2220 LEMP AVE, Saint Louis, MO 63104
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Other Identifiers 3

Medicare PIN9356930422MO
Medicaid207425901MO
Medicare UPINI41737MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margaret E. Baum 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 Margaret Baum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Planned Parenthood Great Rivers-Missouri
2.9 mi
Family Planning, Non-Surgical
4251 FOREST PARK AVE
Saint Louis, MO 63108
  • Reassigned Medicare billing, Missouri enrollment
  • 12 clinicians in this Medicare group
NPI 1205898574 (314) 531-7526

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63104 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.

AFFINIA HEALTHCARE
Clinic/Center (Federally Qualified Health Center (FQHC))
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8514
VANI PACHALLA M.D.
Family Medicine
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8531
ALEXIS HOWELL PHARM.D.
Pharmacist
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8653
AFFINIA HEALTHCARE
Pharmacy (Clinic Pharmacy)
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8570
MICHELLE MULLIN FNP
Nurse Practitioner (Family)
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 898-1700
CLAUDIA VALENTINE-FJONE FNP-BC
Nurse Practitioner
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8680
JENNIFER JUANITA MARKS-FOSTER PSYD
Psychologist (Clinical)
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8777
JULIA TUBERTY KIEHL LCSW
Social Worker (Clinical)
2220 LEMP AVE
SAINT LOUIS, MO 63104
St. Louis City (314) 814-8700

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 Margaret Baum's NPI number?

The NPI number for Margaret Baum is 1891724597. It was assigned to this individual provider in the NPPES registry on July 3, 2006.

Where is Margaret Baum located?

Margaret Baum practices at 2220 Lemp Ave, Saint Louis, MO 63104. The listed phone number is (314) 898-1700.

What is Margaret Baum's specialty?

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

Is Margaret Baum enrolled in Medicare?

Yes. Margaret Baum is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Margaret Baum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Baum reassigns Medicare benefits to Planned Parenthood Great Rivers-Missouri (Saint Louis, 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 Margaret Baum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Margaret Baum accept?

Health plans from Anthem Blue Cross and Blue Shield and UnitedHealthcare list Margaret Baum 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 Margaret Baum was last updated on August 31, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.