Doctor profile · Federal record

Dr. William Kormos, MD

Internal Medicine Physician (CMS: Internal Medicine) · Boston, MA

  • NPI 1366403206
  • Accepts Medicare
  • 34 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
15 Parkman Street Wac 635, Internal Medicine Associates Team 3
Boston, MA 021173117
(617) 724-4600
fax (617) 724-7799
Mailing address
Po Box 9142, Mass General Physician Organization
Charlestown, MA 021299142

Credentials & registration

NPPES · NUCC
NPI registered
March 2006 — 20 yrs on file
Profile last updated
November 21, 2012
Year of graduation
1992 — 34 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
Massachusetts #80405
Medicaid
MA #3155153

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1366403206. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
740
Distinct HCPCS
10
Medicare allowed
$67,811
HCPCS Description Services Patients Avg allowed
99214 Established patient office or other outpatient visit, 30-39 minutes 248 174 $104
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 155 51 $84
99213 Established patient office or other outpatient visit, 20-29 minutes 125 117 $70
99231 Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 84 39 $53
99215 Established patient office or other outpatient visit, 40-54 minutes 31 25 $153
99443 Telephone medical discussion with physician, 21-30 minutes 29 27 $103
99238 Hospital discharge day management, 30 minutes or less 22 22 $87
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 19 13 $126
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 16 15 $138
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment 11 11 $139

In context: peer comparison

Among 547 peers in Boston Internal Medicine Physician, average services per provider: 81. This provider delivers 9.1× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
2,011
Patients
552
Total drug cost
$136,169
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 392 102 $9,145
Lisinopril Generic 288 80 $2,816
Omeprazole Generic 180 53 $4,260
Simvastatin Generic 150 42 $1,871
Levothyroxine Sodium Generic 121 35 $2,287
Amlodipine Besylate Generic 115 35 $1,225
Metoprolol Succinate Generic 107 32 $3,398
Hydrochlorothiazide Generic 99 25 $590
Tamsulosin Hcl Generic 95 29 $4,314
Losartan Potassium Generic 84 18 $1,571

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. William Kormos's medical specialty?
Dr. William Kormos practices Internal Medicine Physician in Boston, MA.
Where does Dr. William Kormos practice?
Dr. William Kormos practices at 15 Parkman Street Wac 635, Boston, MA 021173117. Office phone: 6177244600.
What is Dr. William Kormos's NPI?
Dr. William Kormos's National Provider Identifier (NPI) is 1366403206, issued by NPPES.
Does Dr. William Kormos accept Medicare assignment?
Yes. Dr. William Kormos accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Kormos commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.