Doctor profile · Federal record

Dr. Melissa Vander Wal, M.D.

Internal Medicine Physician (CMS: Internal Medicine) · Vallejo, CA

  • NPI 1154692804
  • Accepts Medicare
  • 16 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
975 Sereno Dr
Vallejo, CA 945892441
(707) 651-2440
fax (707) 651-1261

Credentials & registration

NPPES · NUCC
NPI registered
January 2012 — 14 yrs on file
Profile last updated
January 10, 2022
Year of graduation
2010 — 16 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
California #113343

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1154692804. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
38
Distinct HCPCS
1
Medicare allowed
$3,202
HCPCS Description Services Patients Avg allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 38 19 $84

In context: peer comparison

Among 12 peers in this city , average services per provider: 138. This provider delivers 0.3× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
67
Patients
31
Total drug cost
$870
Drug Type Claims Patients Total cost
Cefpodoxime Proxetil Generic 17 17 $350
Doxycycline Monohydrate Generic 14 14 $123
Furosemide Generic 14 0 $144
Hydralazine Hcl Generic 11 0 $118
Metoprolol Succinate Generic 11 0 $135

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Melissa Vander Wal's medical specialty?
Dr. Melissa Vander Wal practices Internal Medicine Physician in Vallejo, CA.
Where does Dr. Melissa Vander Wal practice?
Dr. Melissa Vander Wal practices at 975 Sereno Dr, Vallejo, CA 945892441. Office phone: 7076512440.
What is Dr. Melissa Vander Wal's NPI?
Dr. Melissa Vander Wal's National Provider Identifier (NPI) is 1154692804, issued by NPPES.
Does Dr. Melissa Vander Wal accept Medicare assignment?
Yes. Dr. Melissa Vander Wal accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Melissa Vander Wal commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.