PROVIDER PROFILE · NPI 1497919401

Johnna WalkerPA-C

PRACTICEMARK A. SCHRUMPF MD A PROFESSIONAL CORPORATIONSee all providers at this practice →

Physician AssistantSan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,215

Unique beneficiaries

—

Total services

4,468

Distinct HCPCS

Medicare payment

$94K

Peer benchmark

Total Medicare services vs. 7,073 Physician Assistant providers in CA — top quintile (cohort median 224).

PRESCRIBING · PART D · 2024

Total Rx claims

730

Beneficiaries

—

Total drug cost

$14K

Distinct drugs

Brand share

7.9%

Top prescribed drugs

Oxycodone Hcl196 claims

Celecoxib185 claims

Amoxicillin86 claims

Tramadol Hcl62 claims

Diclofenac Sodium38 claims

QUALITY · MIPS · 2024

Final MIPS score

83.8

Quality

90.5

Cost

75.6

Improvement activities

40.0

Promoting interop.

76.0

Payment adjustment

0.37%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$32

Payment records

By payment type

Food and Beverage$32

REFERRAL NETWORK

Where Johnna Walker's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 3 inbound referrers · 4 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Peter Callander Orthopedic Surgery · San Francisco, CA	41	115
SUTTER BAY HOSPITALS	11	23
Caroline Dejean Anesthesiology · Cleveland, OH	11	11

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
SUTTER BAY HOSPITALS	40	45
Peter Callander Orthopedic Surgery · San Francisco, CA	37	76
SUTTER VISITING NURSE ASSOCIATION AND HOSPICE	17	17
Protransport 1 Ambulance Service Provider · Rohnert Park, CA	15	16

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history