Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Benjamin L Grannan , MD

Neurological Surgery โ€ข Seattle, WA

Active NPI 1417360561 Individual Practitioner Male Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

325 9th Ave
Seattle, WA 981042420

Call 2065205000 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

325 9th Ave

Seattle, WA 981042420

Telephone 2065205000
Organization at the Same NPPES Address or Phone
Harborview Medical Center Facility NPI 1053359729

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: The Association Of University Physicians. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

Harvard Medical School

Graduation Year

2014

Medicare patients

111 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $4,030 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $3,104 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Open Payments general payments, program year 2025

All general payments: $1,454.56 across 19 records.

By nature of payment

  • Travel and Lodging: $991.33 across 7 records.
  • Food and Beverage: $463.23 across 12 records.

Reporting-company totals

  • Medtronic, Inc.: $1,348.82 across 18 records.
  • Boston Scientific Corporation: $105.74 across 1 record.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

12 years (graduated 2014)

CMS Doctors and Clinicians data list 2014 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2014

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Grannan has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Grannan as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Seattle and Washington

Billing and prescribing volume is not a quality rating.

Medicare Part B services

Fewer Medicare Part B services than 85% of clinicians listed under Neurological Surgery in Seattle, WA (2024, 47 clinicians with data). Median for this group: 203. Middle half: 106 to 307.

Fewer Medicare Part B services than 90% of clinicians listed under Neurological Surgery in Washington (2024, 101 clinicians with data). Median for this group: 216. Middle half: 105 to 328.

Medicare-allowed amount

A lower Medicare-allowed amount than 85% of clinicians listed under Neurological Surgery in Seattle, WA (2024, 47 clinicians with data). Median for this group: $47,616. Middle half: $18,643 to $76,946.

A lower Medicare-allowed amount than 90% of clinicians listed under Neurological Surgery in Washington (2024, 101 clinicians with data). Median for this group: $46,322. Middle half: $14,691 to $83,750.

Paid by Medicare

A lower Medicare payment amount than 85% of clinicians listed under Neurological Surgery in Seattle, WA (2024, 47 clinicians with data). Median for this group: $36,986. Middle half: $14,320 to $61,523.

A lower Medicare payment amount than 90% of clinicians listed under Neurological Surgery in Washington (2024, 101 clinicians with data). Median for this group: $35,269. Middle half: $10,947 to $65,100.

129 active clinicians are listed under Neurological Surgery with a practice address in Seattle, WA (232 in Washington).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Seattle

34.1% of these 129 clinicians have the CMS telehealth indicator.

56.6% of these 129 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 โ€“ December 31, 2025): 19 records totaling $1,454.56.

Manufacturer Payment Nature Product Type Amount ($)
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $331.83
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $199.00
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $197.65
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $162.81
Boston Scientific Corporation
Food and Beverage
In-kind items and services
Vercise General $105.74
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $90.64
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $73.95
Medtronic, Inc.
Food and Beverage
In-kind items and services
ACTIVA PC General $55.95
Medtronic, Inc.
Food and Beverage
In-kind items and services
ACTIVA PC General $36.29
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $35.07
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $35.07
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ACTIVA PC General $29.90
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $22.58
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $18.99
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $16.67
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $15.71
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $13.83
Medtronic, Inc.
Food and Beverage
In-kind items and services
ACTIVA PC General $10.83
Medtronic, Inc.
Food and Beverage
In-kind items and services
PERCEPT PC BRAINSENSE General $2.05

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024
Reporting Year:

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2021โ€“2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2022โ€“2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
27 27 $253.44 $89.81
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
15 14 $299.63 $106.98

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2021-05-13
Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES WA MD61138194

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Washington State Department of Health Provider Lookup.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NEUROSURGERY

Medicare Enrollment ID

I20210510001401

Enrollment State Jurisdiction

WA

PECOS Control ID

1951529361

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

The Association Of University Physicians

325 9th Ave, Seattle, WA 981042420

Phone: 2067313000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

39 listed
Dr. Meagan Alvarado , MD

Internal Medicine - Transplant Hepatology

NPI 1003303363

Doctor of Medicine (M.D.)

Kathryn Anderson , ARNP

Nurse Practitioner

NPI 1003331414

Advanced Registered Nurse Practitioner

Mir Mohammad Ali Ansary

Internal Medicine

NPI 1003235698
Jennifer Branham , ARNP

Nurse Practitioner

NPI 1003251273

Advanced Registered Nurse Practitioner

Timothy Butterworth , CRNA

Nurse Anesthetist, Certified Registered

NPI 1003325333

Certified Registered Nurse Anesthetist

Dr. Maria Corcorran , MD

Internal Medicine

NPI 1003159013

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
๐Ÿ“
Updated Practice Location May 13, 2021

Registered at 325 9TH AVE, SEATTLE, WA 981042420 (Tel: 2065205000)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) May 13, 2021

Neurological Surgery (license number reported to NPPES: WA MD61138194)

โœ…
NPI Profile Active June 06, 2014

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) June 06, 2014

Registered at MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., BOSTON, MA 02114 (Tel: 6177265143)

๐Ÿ“
Business Mailing Address (Initial Record) June 06, 2014

Registered at MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., BOSTON, MA 02114 (Tel: 6177265143)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) June 06, 2014

Recorded as BENJAMIN GRANNAN, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) June 06, 2014

Neurological Surgery (license number reported to NPPES: MA L-259160)

๐ŸŸข
Initial NPI Registration & Enumeration June 06, 2014

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1417360561
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 06, 2014
Last Update: May 13, 2021
Sole Proprietor: No

Other Neurological Surgery Specialists in Seattle

All Neurological Surgery Specialists in Seattle

Mailing Address

Massachusetts General Hospital, 55 Fruit St.

Boston, MA 02114

Phone: 6177265143

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.