Doctor profile · Federal record

Dr. ZACHARY EINWECHTER, MD

Internal Medicine Physician (CMS: INTERNAL MEDICINE) · Student in an Organized Health Care Education/Training Program · PORTSMOUTH, NH

  • NPI 1235767476
  • Accepts Medicare
  • 6 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
333 BORTHWICK AVE
PORTSMOUTH, NH 038017128
(603) 559-4129

Credentials & registration

NPPES · NUCC
NPI registered
April 2020 — 6 yrs on file
Profile last updated
May 24, 2023
Year of graduation
2020 — 6 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
New Jersey #25MA11756500

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1235767476. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
564
Distinct HCPCS
4
Medicare allowed
$69,165
HCPCS Description Services Patients Avg allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 363 123 $124
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 78 41 $83
99239 Hospital discharge day management, more than 30 minutes 77 76 $120
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 46 44 $181

In context: peer comparison

Among 8 peers in this city , average services per provider: 122. This provider delivers 4.6× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$35
Transactions
2
Manufacturers
2
Payer (manufacturer) Industry Txns Amount
Novartis Pharmaceuticals Corporation 1 $19.96
Boehringer Ingelheim Pharmaceuticals, Inc. 1 $15.02

By nature of payment

Food and Beverage
$35

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
97
Patients
28
Total drug cost
$8,643
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 29 13 $381
Prednisone Generic 19 15 $158
Metoprolol Succinate Generic 15 0 $171
Carvedilol Er (Carvedilol Phosphate) Brand 12 0 $1,198
Eliquis (Apixaban) Brand 11 0 $6,500
Omeprazole Generic 11 0 $236

Hospital affiliations

CMS Hospital Compare