Physician

Allison Jean Hahr, M.D.

According to 2025 Medicare claims, Allison Hahr, M.D. (NPI: 1083774889) practices endocrinology in the Chicago-Naperville-Schaumburg, IL market, with the plurality of this provider's patient population coming from Cook, IL. This provider's primary affiliated billing organization is NORTHWESTERN MEDICAL FACULTY FOUNDATION (NPI: 1346235314; TIN: 363097297) and primary practice location at 60611-2027. Hahr is affiliated with the Northwestern Medicine Physician Network ACO (ACO ID: A2620), participating under the MSSP model.

Hahr's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,355 traditional Medicare patients, billed 44,830 HCPCS/CPT codes, and received $670,610 in Medicare payments. The top billing code was 99214 (Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more). Part D data shows 1,181 prescription claims across 282 beneficiaries totaling $1,610,694 in drug costs, led by Crysvita (Burosumab-Twza). DME data shows 31 claims. No Open Payments records. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has moved from a lower plateau to a higher plateau, from $131,222 to $670,610. Similarly, Part D prescription costs have moved sharply higher in recent years, from $498,281 to $1,610,694. In contrast, DME billing represents a smaller volume and rose steadily, from $1,402 to $15,171.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	1,040	5,512	$131,222
2016	1,094	9,164	$178,822
2017	1,330	15,713	$279,968
2018	1,582	18,088	$337,011
2019	1,631	22,469	$424,299
2020	973	19,780	$548,259
2021	1,231	44,076	$788,986
2022	1,162	56,060	$967,254
2023	1,203	51,519	$684,875
2024	1,355	44,830	$670,610

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	205	1,300	$498,281
2016	212	1,377	$794,195
2017	232	1,480	$897,486
2018	232	1,263	$675,737
2019	293	1,263	$639,455
2020	272	1,272	$570,100
2021	284	1,251	$420,119
2022	299	1,231	$578,285
2023	307	1,252	$1,495,870
2024	282	1,181	$1,610,694

DME Billing Trend

Medicare payment trend, with N of patients and DME claim records in the table.

Year	Patients	Claims	Payment
2015	37	107	$2,195
2016	15	59	$1,223
2017	17	49	$1,163
2018	30	91	$5,040
2019	15	74	$6,713
2020	11	83	$10,442
2021	N/R	89	$11,245
2022	N/R	43	$7,914
2023	N/R	81	$16,055
2024	N/R	31	$13,063

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	426	444	$96
77080	Dxa bone density measurement of hip, pelvis, spine	811	811	$41
J0897	Injection, denosumab, 1 mg	153	15,660	$20
G2211	Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	481	515	$13
96372	Injection of drug or substance under skin or into muscle	177	511	$12

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Crysvita	Burosumab-Twza	23	644	$1,163,254
Tymlos	Abaloparatide	53	1,830	$158,990
Forteo	Teriparatide	38	1,088	$154,075
Ozempic	Semaglutide	13	832	$23,014
Synthroid	Levothyroxine Sodium	131	11,212	$12,437

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
A4239	Supply allowance for non-adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service	N	N/R	31	$13,063

Open Payments Summary

No connected Open Payments records were found for this physician in General Payments, Research Payments, or Ownership / Investment Interests.

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FAQ

What Medicare data is available for Allison Jean Hahr, M.D.?

Tedicare shows public-source Medicare data for Allison Jean Hahr, M.D. (NPI 1083774889), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Allison Jean Hahr, M.D. have ACO affiliation data?

Allison Jean Hahr, M.D. is shown with ACO affiliation data for Northwestern Medicine Physician Network ACO (MSSP, ACO ID A2620).

What billing organization is linked to Allison Jean Hahr, M.D.?

Allison Jean Hahr, M.D. is linked to NORTHWESTERN MEDICAL FACULTY FOUNDATION (billing NPI 1346235314) in the available physician profile data.

Does Allison Jean Hahr, M.D. have Open Payments data?

No connected Open Payments records are shown for this physician in the available General Payments, Research Payments, or Ownership / Investment Interests data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.