Doctor profile · Federal record

Dr. Margaret Delmastro, RNP

Family Nurse Practitioner · Registered Nurse · Orange, CA

  • NPI 1043533110
  • 16 yrs on file
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
1100 W Stewart Dr
Orange, CA 928683849
(714) 734-6268
fax (714) 734-6231
Mailing address
14692 Buckingham Pl
Tustin, CA 927806615

Credentials & registration

NPPES · NUCC
NPI registered
March 2010 — 16 yrs on file
Profile last updated
December 4, 2014
Specialty taxonomy
363LF0000X — NUCC code
State license (1)
California #221014

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1043533110. Last verified May 11, 2026.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$145
Transactions
2
Manufacturers
2
Payer (manufacturer) Industry Txns Amount
Eisai Inc. 1 $120.35
ABBVIE INC. 1 $24.89

By nature of payment

Food and Beverage
$145

Frequently asked questions

Auto-generated from federal data
What is Dr. Margaret Delmastro's medical specialty?
Dr. Margaret Delmastro practices Family Nurse Practitioner in Orange, CA.
Where does Dr. Margaret Delmastro practice?
Dr. Margaret Delmastro practices at 1100 W Stewart Dr, Orange, CA 928683849. Office phone: 7147346268.
What is Dr. Margaret Delmastro's NPI?
Dr. Margaret Delmastro's National Provider Identifier (NPI) is 1043533110, issued by NPPES.