PROVIDER PROFILE · NPI 1841266327

Marylyn GrondinM.D.

GastroenterologyPortsmouth, NHI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

647

Unique beneficiaries

—

Total services

694

Distinct HCPCS

Medicare payment

$71K

Peer benchmark

Total Medicare services vs. 73 Gastroenterology providers in NH — top quintile (cohort median 686).

PRESCRIBING · PART D · 2024

Total Rx claims

393

Beneficiaries

—

Total drug cost

$38K

Distinct drugs

Brand share

17.3%

Top prescribed drugs

Pantoprazole Sodium127 claims

Omeprazole87 claims

Famotidine50 claims

Linaclotide35 claims

Ondansetron21 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

0.0

Cost

0.0

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$413

Payment records

By payment type

Food and Beverage$413

REFERRAL NETWORK

Where Marylyn Grondin's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 16 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
EXETER HOSPITAL INC	56	122
Paradigm Clinical Associates Llc Ambulatory Surgical Center · Stratham, NH	56	72
SCHWAEGERLE, SONYA	53	77
Christopher Oneill Anesthesiology · Salem, NH	27	31
WENTWORTH DOUGLASS HOSPITAL	25	76
RHODES, DOUGLAS	23	43
YORK HOSPITAL	22	59
HICKMAN, JOY	18	26
FERGUSON, DOUGLAS	17	18
Alexander Raslavicus Diagnostic Radiology · Exeter, NH	14	20
Archie Mcgowan Diagnostic Radiology · Portland, ME	14	21
Olivera Quitkin Anesthesiology · Portsmouth, NH	12	26

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history