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

Mrs. Sydney Hadley, DO

Individual provider Internal Medicine Physician · NPI 1346982634

Mrs. Sydney Hadley, DO is an Internal Medicine in Oak Lawn, Illinois. Qualified in 2022, 4 years ago. Practices with Wabash General Hospital District, a 75-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

4440 W 95th St
Oak Lawn, IL 60453-2600
Phone: (708) 684-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036.175126 (IL)

Record details

NPI number1346982634
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 8, 2022
Last updated in NPPESAugust 19, 2025
Certification dateAugust 12, 2025
Mailing address1418 College Dr, Mount Carmel, IL 62863-2638

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Wabash General Hospital District — 75 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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