Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Nathan Sharkey Asner, DO

Individual provider Family Medicine Physician · NPI 1407506611

Nathan Sharkey Asner, DO is a Family Practice in Rockford, Illinois. Qualified in 2022, 4 years ago. Practices with Swedishamerican Hospital, a 387-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
4
Licensed in
IL
In the registry since
2022
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2404 Charles St
Rockford, IL 61108-1602
Phone: (779) 696-7910
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036.176248 (IL)

Record details

NPI number1407506611
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 29, 2022
Last updated in NPPESMay 28, 2026
Certification dateMay 28, 2026
Mailing address4159 Crocus Ln, Rockford, IL 61102-4467

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Swedishamerican Hospital — 387 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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