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DR. KATHARINE M JOHNSON MD
NPI 1790985984
Pediatrics - Neonatal-Perinatal Medicine in San Antonio, TX

Active since July 25, 2007PECOS Enrolled
5430 FREDERICKSBURG RD STE 508, SAN ANTONIO, TX 78229(210) 541-8281(210) 541-9123 Get Directions Write a Review

NPPES record last updated: December 29, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Katharine M Johnson Md NPPES

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

DR. KATHARINE M JOHNSON MD (NPI 1790985984) is an individual neonatal-perinatal medicine provider in San Antonio, Texas, licensed in Texas (P2693) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in San Antonio.

NPPES Registry Identity

NPI1790985984
Entity TypeIndividualFemale
Primary Taxonomy2080N0001X
Provider Legal NameDR. KATHARINE M JOHNSONCredential: MD
Location Address5430 FREDERICKSBURG RD STE 508San Antonio, TX 78229-3561
Mailing Address5430 Fredericksburg Rd Ste 508San Antonio, TX 78229-3561 · (210) 541-8281 · Fax (210) 541-9123
Phone(210) 541-8281
Fax(210) 541-9123
Sole ProprietorNo
Enumeration DateJuly 25, 2007
Last NPPES UpdateDecember 29, 2020
NPPES CertifiedDecember 29, 2020
✔ NPI 1790985984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in TX · P2693
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
Also ListedPediatricsTaxonomy 208000000X · License MD12958 (RI)
5430 FREDERICKSBURG RD STE 508, San Antonio, TX 78229
Open in Google Maps ↗

Secondary Practice Location 1

Location 15414 Fredericksburg Rd, Suite 100San Antonio, TX 78229-3641 · Phone (210) 541-8281

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Oscar 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 (PECOS)

Dr. Katharine M Johnson Md 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 Katharine Johnson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Magella Medical Associates Billing, Inc.
86 mi
Neonatal-Perinatal Medicine
2400 ROUND ROCK AVE
Round Rock, TX 78681
  • Reassigned Medicare billing, Texas enrollment
  • 432 clinicians in this Medicare group
NPI 1083631071 (512) 341-1000

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

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.

KATHLEEN MARIE MCINNIS NNP
Nurse Practitioner (Neonatal)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
MRS. KAYLYN PRATT RANDALL PA
Physician Assistant
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
SUSAN MARIE MERCIER NNP
Nurse Practitioner (Neonatal)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
MARION JOSEPHINE ACHESON-SILVER MS, RN, NNP-BC
Nurse Practitioner (Neonatal)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
MELISSA HELENE ALTHOUSE MD
Pediatrics (Neonatal-Perinatal Medicine)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
SARA KATHERINE ROLLINS NNP
Nurse Practitioner (Neonatal)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 541-8281
MS. KERRY INTO PNP
Nurse Practitioner (Pediatrics)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 614-5539
EUGENIA BALDIZON PNP
Nurse Practitioner (Pediatrics)
5430 FREDERICKSBURG RD STE 508
SAN ANTONIO, TX 78229
Bexar County (210) 614-5539

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 Katharine Johnson's NPI number?

The NPI number for Katharine Johnson is 1790985984. It was assigned to this individual provider in the NPPES registry on July 25, 2007.

Where is Katharine Johnson located?

Katharine Johnson practices at 5430 Fredericksburg Rd Ste 508, San Antonio, TX 78229. The listed phone number is (210) 541-8281.

What is Katharine Johnson's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Katharine Johnson enrolled in Medicare?

Yes. Katharine Johnson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Katharine Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katharine Johnson reassigns Medicare benefits to Magella Medical Associates Billing, Inc. (Round Rock, TX). 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 Katharine Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katharine Johnson accept?

Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Oscar Health, Oscar Insurance Company and WellPoint list Katharine Johnson 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 Katharine Johnson was last updated on December 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.