Individual provider Active NPI

Sridhar S. Iyer, MD

  • Obstetrics & Gynecology Physician
  • Leominster, MA
National Provider Identifier
1558374413
Registry record updated Nov 16, 2020
On this page

Key facts

NPPES NPI Registry
Primary specialty
Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X
License
219581 Issued in MA
Practice address
100 Hospital Rd
Suite 1B
Leominster, MA 01453
Phone
(978) 466-4550
NPI assigned
Aug 14, 2006
Last updated
Nov 16, 2020By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 16, 2020

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Obstetrics & Gynecology Physician 207V00000X 219581 MA Primary

Addresses

Primary practice location

100 Hospital Rd
Suite 1B
Leominster, MA 01453

Mailing address

PO Box 415348
Boston, MA 02241-5348

Other identifiers 1

IdentifierTypeStateIssuer
110081016AMedicaidMA

Electronic endpoints 2

TypeEndpointUseAffiliation
Direct Messaging Address siyer8690@UmassMemorial.direct-ci.com
FHIR URL https://epicproxy.et0978.epichosted.com/FHIRProxy/api/FHIR/DSTU2/

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA, MT2 enrollments
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20081211000466 MA Practitioner - Obstetrics/Gynecology 4981669058 Reassigns benefits to 2 organizations
I20251121004232 MT Practitioner - Obstetrics/Gynecology 4981669058 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Obstetrics/Gynecology
Education
Other, 1978
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

100 Hospital Rd
Leominster, MA 01453-2253
Phone (978) 466-4220

55 Lake Ave N
Worcester, MA 01655-0002
Phone (508) 334-1000

60 Hospital Rd
Leominster, MA 01453-2205
Phone (978) 466-2257

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
100 of 100Reported as apm
Quality
82.98
Promoting interoperability
100
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Sidney Health Center CurrentSince Nov 26, 2025 Accepting new patients
Sidney Health Center Current Accepting new patients
Obhg Massachusetts - Direct, P.C. CurrentSince Nov 1, 2023 Accepting new patients
Sidney Health Center CurrentSince Nov 26, 2025 Accepting new patients
Sidney Health Center CurrentSince Nov 26, 2025 Accepting new patients
Umass Memorial Medical Group Inc Obstetrics & Gynecology CurrentSince Aug 1, 2011 Accepting new patients
Umass Memorial Medical Group, Inc. CurrentSince Aug 1, 2011 Accepting new patients
Umass Memorial Healthalliance Clinton Hospital Inc Past Accepting new patients
Bernard a Westerling III, MD, LLC Past Accepting new patients
Primary Care Physicans Past Accepting new patients
Coordinated Primary Care, Inc. Past Accepting new patients
Sidney Health Center Past Accepting new patients

Locations

680 Centre St
Brockton, MA 02302
Phone (508) 941-7400

76 Summer St
Ste 210
Fitchburg, MA 01420
Phone (978) 343-9400

115 Lincoln St
Framingham, MA 01702
Phone (508) 383-1000

100 Hospital Rd
Ste 1B
Leominster, MA 01453
Phone (978) 466-4550

60 Hospital Rd
Leominster, MA 01453
Phone (978) 466-2000

340 Thompson Rd
Webster, MA 01570
Phone (508) 943-2600

123 Summer St
Worcester, MA 01608
Phone (508) 363-6000

55 Lake Ave N
Worcester, MA 01655
Phone 508334100048862

214 14th Ave SW
Sidney, MT 59270
Phone (406) 488-2100

216 14th Ave SW
Sidney, MT 59270
Phone (406) 488-2100

Interoperability endpoints

  • Direct secure messaging: siyer8690@umassmemorial.direct-ci.com

Organizations & group practices 12

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 2

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1155513600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1605484800000",
    "number": "1558374413",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 415348",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022415348"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 HOSPITAL RD",
            "address_2": "SUITE 1B",
            "city": "LEOMINSTER",
            "state": "MA",
            "postal_code": "01453",
            "telephone_number": "978-466-4550"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "IYER",
        "first_name": "SRIDHAR",
        "middle_name": "S.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-14",
        "last_updated": "2020-11-16",
        "certification_date": "2020-11-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "MA",
            "license": "219581",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "110081016A",
            "state": "MA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "siyer8690@UmassMemorial.direct-ci.com",
            "affiliation": "N",
            "address_1": "100 Hospital Rd",
            "address_2": "Suite 1B",
            "city": "Leominster",
            "state": "MA",
            "country_code": "US",
            "postal_code": "01453",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0978.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "100 Hospital Rd",
            "address_2": "Suite 1B",
            "city": "Leominster",
            "state": "MA",
            "country_code": "US",
            "postal_code": "01453",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Leominster, MA

Sources for this page

Verify at the official NPI Registry.