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Jonathan Michael Harper , RN, MSN, NP-C, ARNP

Nurse Practitioner - Gerontology • Seattle, WA

Active NPI 1124792148 Individual Practitioner Male Practitioner
Practice location in NPPES

4515 Martin Luther King Jr Way S Ste 100
Seattle, WA 981082183

Call 2063205325 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

4515 Martin Luther King Jr Way S Ste 100

Seattle, WA 981082183

Telephone 2063205325
Organization at the Same NPPES Address or Phone
Providence Health & Services - Washington Facility NPI 1881681518

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

30-day fills

2,963 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$224,014 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $115.75 in 2025

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2025.

Guide: How to read an Open Payments record

NPI first issued

2021

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.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

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, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

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

Guide: How Medicare covers telehealth

Compared with the same specialty in Seattle and Washington

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

More Part D prescriptions than 95% of clinicians listed under Nurse Practitioner - Gerontology in Seattle, WA (2024, 21 clinicians with data). Median for this group: 181. Middle half: 114 to 796.

More Part D prescriptions than 80% of clinicians listed under Nurse Practitioner - Gerontology in Washington (2024, 106 clinicians with data). Median for this group: 511. Middle half: 137 to 1,919.

Part D drug cost

A higher Part D drug cost than 95% of clinicians listed under Nurse Practitioner - Gerontology in Seattle, WA (2024, 21 clinicians with data). Median for this group: $10,340. Middle half: $3,500 to $41,296.

A higher Part D drug cost than 80% of clinicians listed under Nurse Practitioner - Gerontology in Washington (2024, 106 clinicians with data). Median for this group: $42,842. Middle half: $5,764 to $182,424.

50 active clinicians are listed under Nurse Practitioner - Gerontology with a practice address in Seattle, WA (209 in Washington).

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

Telehealth indicator in Seattle

16% of these 50 clinicians have the CMS telehealth indicator.

40% of these 50 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (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 · 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 · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $115.75.

Manufacturer Payment Nature Product Type Amount ($)
Boston Scientific Corporation
Food and Beverage
In-kind items and services
LithoVue General $115.75

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

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Atorvastatin Calcium Atorvastatin Calcium 168 4,665 $5,623.40 24
Amlodipine Besylate Amlodipine Besylate 154 4,305 $3,871.14 24
Gabapentin Gabapentin 135 3,404 $5,068.62 22
Lisinopril Lisinopril 109 3,089 $2,999.44 22
Oxycodone Hcl Oxycodone Hcl 103 1,938 $3,045.69 23
Metoprolol Succinate Metoprolol Succinate 88 2,444 $2,602.22 18
Buprenorphine Buprenorphine 86 2,425 $6,607.31 15
Losartan Potassium Losartan Potassium 76 2,184 $2,391.58 13
Pantoprazole Sodium Pantoprazole Sodium 73 2,035 $2,772.43 14
Pregabalin Pregabalin 69 1,992 $4,498.53 —
Eliquis Apixaban 68 1,890 $36,270.12 15
Furosemide Furosemide 67 1,857 $1,681.63 —
Tamsulosin Hcl Tamsulosin Hcl 59 1,714 $1,994.28 —
Trazodone Hcl Trazodone Hcl 55 1,573 $1,568.27 —
Metformin Hcl Metformin Hcl 54 1,585 $1,206.02 —
Duloxetine Hcl Duloxetine Hcl 51 1,487 $1,518.47 —
Levothyroxine Sodium Levothyroxine Sodium 50 1,447 $1,068.68 —
Mirtazapine Mirtazapine 49 1,436 $1,403.66 —
Jardiance Empagliflozin 48 1,377 $26,992.31 11
Omeprazole Omeprazole 47 1,314 $1,635.71 —
Albuterol Sulfate Hfa Albuterol Sulfate 43 871 $1,437.49 21
Quetiapine Fumarate Quetiapine Fumarate 39 1,103 $2,208.35 —
Rosuvastatin Calcium Rosuvastatin Calcium 39 1,099 $1,850.23 —
Pravastatin Sodium Pravastatin Sodium 38 1,096 $837.05 —
Clopidogrel Clopidogrel Bisulfate 35 940 $1,455.31 —

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2021-08-03
Nurse Practitioner - Gerontology Primary Specialty

NUCC Taxonomy Code: 363LG0600X

License # reported to NPPES WA AP61190518
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

Clinicians Sharing This Practice Address or Phone

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

8 listed
Dr. Yan Chen , MD

Internal Medicine - Geriatric Medicine

NPI 1609118496

Doctor of Medicine (M.D.)

Rachel Epstein , ARNP

Nurse Practitioner - Adult Health

NPI 1164763611

Advanced Registered Nurse Practitioner

Dr. Laura Hall , DNP, FNP

Nurse Practitioner - Family

NPI 1407538457

Doctor of Nursing Practice, Family Nurse Practitioner

Dr. Phoebe Horvath , DNP, ARNP, FNP-BC

Nurse Practitioner - Family

NPI 1023790342

Doctor of Nursing Practice, Advanced Registered Nurse Practitioner, Family Nurse Practitioner (Board Certified)

Dr. Assadullah Kazemi , MD

Family Medicine - Geriatric Medicine

NPI 1245380468

Doctor of Medicine (M.D.)

Ann Mosbacher , NP-C

Nurse Practitioner - Primary Care

NPI 1770905564

Nurse Practitioner (Certified)

Career & Practice History

NPI enumerated August 03, 2021.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from August 2021 to August 2026.

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NPI Administrative Meta

NPI Number: 1124792148
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 03, 2021
Last Update: August 03, 2021
Sole Proprietor: No

Other Nurse Practitioner - Gerontology Specialists in Seattle

All Nurse Practitioner - Gerontology Specialists in Seattle

Mailing Address

720 N 10th St # 366

Renton, WA 980575683

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.