NPPES file of Aug 9, 2026

David Aaron Timm, OTR/L

Occupational Therapist · Chicago, IL

David Aaron Timm, OTR/L is an occupational therapist with a practice address in Chicago, Illinois, and NPI 1245070440, issued on May 28, 2024. Check the license (Illinois 056.016023, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1245070440
Name
David Aaron Timm
Credential
OTR/L
Primary taxonomy
Occupational Therapist 225X00000X
License number
056.016023 IL
Self-reported in NPPES; status is on the state search
Practice location
6840 N Sacramento Ave, Chicago, IL 60645
Phone
(877) 407-3422
Enumerated
May 28, 2024
Record last updated
Mar 26, 2025
Fax
(877) 407-4329
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest occupational therapist records → All 5,855 in Illinois → Look up another NPI →

Also registered at 6840 N Sacramento Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Eileen Aronson, OTR/LOccupational Therapist1023309713
  2. Erin HillsSpeech-Language Pathologist1992526867
  3. James KeetonSpeech-Language Pathologist1073993960
  4. Tracy Markowitz, PTPhysical Therapist1881995181

Verify David Aaron Timm in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 056.016023    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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David Aaron Timm among 5,855 occupational therapist records in Illinois

David Aaron Timm, OTR/L is one of 5,855 occupational therapist records with a practice address in Illinois. 13% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2024, is newer than 88% of them.

  • NPI issued2024 · 88% of these records are older, 7% newer
  • In a Medicare fileNo · 13% of these records are
  • In the CMS Doctors and Clinicians fileNo · 14% of these records are
  • Record last updated2025 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225X00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

1,267 occupational therapist records list a practice address in Chicago

They are 1,267 of the 63,379 NPPES records with a practice address in Chicago, and 5,855 occupational therapist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 5,855 in Illinois → Every provider in Chicago → Occupational Therapist nationwide →

The 8 occupational therapist records with the nearest ZIP codes

  1. Eileen Aronson, OTR/LChicago, IL 606451023309713
  2. Cheryl Cohen, O.T.Chicago, IL 606451124364310
  3. Sheila Costanzo, OTR/LChicago, IL 606451235377912
  4. Catharine Costello, OTRLChicago, IL 606451720107998
  5. Shari Feifel, OTR/LChicago, IL 606451255597761
  6. Robin GarfinkelChicago, IL 606451699171496
  7. Susan GlassenbergChicago, IL 606451528137585
  8. Ahuva HorowitzChicago, IL 606451245668441

Common questions

What is David Aaron Timm, OTR/L's NPI number?

David Aaron Timm, OTR/L's National Provider Identifier (NPI) is 1245070440, issued on May 28, 2024. An NPI identifies a provider in billing; it is not a license.

Where is David Aaron Timm, OTR/L located?

The NPPES record lists a practice address at 6840 N Sacramento Ave, Chicago, IL, 60645. Phone: (877) 407-3422. Providers update this record themselves, so call before visiting.

How can I verify David Aaron Timm, OTR/L's license?

NPPES lists Illinois license number 056.016023, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.