Physician

Anita Kay Gregory, M.D.

According to 2025 Medicare claims, Anita Gregory, M.D. (NPI: 1881655868) practices colorectal surgery (formerly proctology) in the Anaheim-Santa Ana-Irvine, CA market, with the plurality of this provider's patient population coming from Orange, CA. This provider's primary affiliated billing organization is ORANGE SURGICAL ASSOCIATES (NPI: 1902630841; TIN: 994723757) and primary practice location at 92868-3849.

Gregory's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 193 traditional Medicare patients, billed 367 HCPCS/CPT codes, and received $53,462 in Medicare payments. The top billing code was 45378 (Diagnostic exam of large bowel using a flexible endoscope). Part D data shows 224 prescription claims across 92 beneficiaries totaling $6,821 in drug costs, led by Hydrocortisone (Hydrocortisone). DME data shows 83 claims. Open Payments data shows 3 records totaling $175. 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 declined steadily, from $78,241 to $53,462. Concurrently, Part D prescription costs have moved up and down with repeated peaks and valleys, starting at $8,341 and ending at $6,821. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	210	381	$78,241
2016	212	449	$85,438
2017	286	549	$89,385
2018	241	387	$79,495
2019	215	399	$68,761
2020	184	352	$64,006
2021	137	196	$58,092
2022	202	366	$72,045
2023	186	355	$67,102
2024	193	367	$53,462

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	70	182	$8,341
2016	80	184	$6,156
2017	114	233	$13,201
2018	121	286	$9,970
2019	96	225	$12,068
2020	84	220	$11,769
2021	102	231	$13,075
2022	98	251	$9,367
2023	99	254	$10,451
2024	92	224	$6,821

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	52	$6,077
2016	N/R	51	$8,236
2017	N/R	51	$7,981
2018	N/R	101	$13,686
2019	N/R	118	$15,599
2020	N/R	89	$12,515
2021	N/R	191	$68,782
2022	N/R	61	$11,556
2023	N/R	81	$14,623
2024	N/R	83	$14,271

* / # = 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
45378	Diagnostic exam of large bowel using a flexible endoscope	36	36	$144
45380	Biopsy of large bowel using a flexible endoscope	16	16	$138
46600	Diagnostic exam of anus using an endoscope	28	29	$101
99203	New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	136	136	$85
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	54	72	$73

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Hydrocortisone	Hydrocortisone	44	898	$542
Procto-Med Hc	Hydrocortisone	22	533	$236
Neomycin Sulfate	Neomycin Sulfate	16	17	$94
Ibuprofen	Ibuprofen	27	185	$63
Metronidazole	Metronidazole	19	42	$48

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
A4407	Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each	N	N/R	14	$5,228
A4385	Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each	N	N/R	21	$3,190
A4409	Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, 4 x 4 inches or smaller, each	N	N/R	16	$2,722
A4425	Ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each	N	N/R	18	$2,290
A4394	Ostomy deodorant, with or without lubricant, for use in ostomy pouch, per fluid ounce	N	N/R	14	$840

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	3	$175	Axonics, Inc.
Research Payments	Reported research-related payment or transfer-of-value amount.	0	$0	N/R
Ownership / Investment Interests	Reported value of ownership or investment interests.	0	$0	N/R

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FAQ

What Medicare data is available for Anita Kay Gregory, M.D.?

Tedicare shows public-source Medicare data for Anita Kay Gregory, M.D. (NPI 1881655868), 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 Anita Kay Gregory, M.D. have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Anita Kay Gregory, M.D.?

Anita Kay Gregory, M.D. is linked to ORANGE SURGICAL ASSOCIATES (billing NPI 1902630841) in the available physician profile data.

Does Anita Kay Gregory, M.D. have Open Payments data?

Anita Kay Gregory, M.D. has 3 connected Open Payments records in the available 2024 summary 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.