Dr. Maria Ignacio , MD
Internal Medicine โข Chicago, IL
4025 N Western Ave
Chicago, IL 606183726
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Maria Ignacio is listed in NPPES under Internal Medicine.
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NPI assigned on July 25, 2006; this date does not establish years in practice.
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Published CMS data list 46 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99213 โ Established patient outpatient office visit: 46 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 2,302 Medicare Part D prescriptions, including refills, in 2022.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2022. Published rows only; this is not a quality measure.
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Published Part D records, 2022:
- Atorvastatin Calcium โ 231 prescription fills, including refills.
- Amlodipine Besylate โ 214 prescription fills, including refills.
- Simvastatin โ 160 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2022. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 60 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 604 in 2018 to 46 in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2018โ2022.
Practice Location & Contact Primary Location
4025 N Western Ave
Chicago, IL 606183726
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $4,422 in 2022
The total amount Medicare approved for these services in 2022. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022.
Paid by Medicare
About $1,566 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022.
30-day fills
6,138 standardized 30-day fills in 2022
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$185,352 in 2022
The total cost of these prescriptions in 2022, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2022.
Open Payments general payments, program year 2025
All general payments: $153.48 across 2 records.
By nature of payment
- Food and Beverage: $153.48 across 2 records.
Reporting-company totals
- Bristol Myers Squibb Company: $110.08 across 1 record.
- Abbott Laboratories: $43.40 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Ignacio are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Ignacio are from 2022.
2,870 active clinicians are listed under Internal Medicine with a practice address in Chicago, IL (7,245 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
13.3% of these 2,870 clinicians have the CMS telehealth indicator.
38.5% of these 2,870 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 92% from 604 in 2018 to 46 in 2022.
- 2018: 604
- 2019: 276
- 2020: 237
- 2021: 200
- 2022: 46
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Medicare-allowed amount
Medicare-allowed amount decreased 87% from $34,323 in 2018 to $4,422 in 2022.
- 2018: $34,323
- 2019: $22,388
- 2020: $19,710
- 2021: $23,300
- 2022: $4,422
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Paid by Medicare
Paid by Medicare decreased 93% from $22,529 in 2018 to $1,566 in 2022.
- 2018: $22,529
- 2019: $14,782
- 2020: $11,477
- 2021: $15,763
- 2022: $1,566
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 67% from 6,992 in 2018 to 2,302 in 2022.
- 2018: 6,992
- 2019: 5,239
- 2020: 6,080
- 2021: 6,119
- 2022: 2,302
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30-day fills
30-day fills decreased 60% from 15,456 in 2018 to 6,138 in 2022.
- 2018: 15,456
- 2019: 12,663
- 2020: 14,689
- 2021: 14,751
- 2022: 6,138
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Part D drug cost
Part D drug cost decreased 42% from $320,192 in 2018 to $185,352 in 2022.
- 2018: $320,192
- 2019: $207,457
- 2020: $357,831
- 2021: $459,856
- 2022: $185,352
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $14.99 in 2020 to $153.48 in 2025.
- 2020: $14.99
- 2022: $91.10
- 2023: $138.55
- 2024: $241.41
- 2025: $153.48
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2022), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $153.48.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
|
REBLOZYL | General | $110.08 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
|
ENSITE | General | $43.40 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2021 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2022; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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46 | 44 | $161.00 | $96.12 |
Source: CMS Part B by Provider and Service, 2022; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2022.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 231 | 19,735 | $2,940.31 | 103 |
| Amlodipine Besylate | Amlodipine Besylate | 214 | 18,930 | $1,445.92 | 100 |
| Simvastatin | Simvastatin | 160 | 13,411 | $1,319.16 | 77 |
| Metformin Hcl | Metformin Hcl | 160 | 14,295 | $1,302.35 | 89 |
| Losartan Potassium | Losartan Potassium | 156 | 13,474 | $1,613.83 | 77 |
| Levothyroxine Sodium | Levothyroxine Sodium | 114 | 9,829 | $2,251.08 | 55 |
| Metoprolol Succinate | Metoprolol Succinate | 65 | 5,700 | $1,171.40 | 33 |
| Lisinopril | Lisinopril | 61 | 5,490 | $366.41 | 32 |
| Alendronate Sodium | Alendronate Sodium | 59 | 4,694 | $511.92 | 27 |
| Metoprolol Tartrate | Metoprolol Tartrate | 47 | 3,810 | $332.46 | 24 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 47 | 3,132 | $34,101.05 | 18 |
| Gabapentin | Gabapentin | 39 | 2,800 | $381.66 | 21 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 37 | 1,014 | $2,319.09 | 11 |
| Carvedilol | Carvedilol | 35 | 2,909 | $477.05 | 19 |
| Glimepiride | Glimepiride | 34 | 2,880 | $540.56 | 20 |
| Hydrochlorothiazide | Hydrochlorothiazide | 34 | 2,820 | $122.55 | 19 |
| Pantoprazole Sodium | Pantoprazole Sodium | 34 | 2,850 | $441.42 | 16 |
| Pravastatin Sodium | Pravastatin Sodium | 33 | 2,790 | $669.05 | 14 |
| Glipizide Er | Glipizide | 33 | 2,970 | $855.16 | 15 |
| Glipizide | Glipizide | 32 | 2,880 | $297.00 | 17 |
| Allopurinol | Allopurinol | 30 | 2,580 | $366.20 | 20 |
| Omeprazole | Omeprazole | 30 | 1,732 | $222.76 | 14 |
| Warfarin Sodium | Warfarin Sodium | 29 | 2,418 | $469.49 | โ |
| Tamsulosin Hcl | Tamsulosin Hcl | 28 | 2,520 | $366.24 | 13 |
| Donepezil Hcl | Donepezil Hcl | 25 | 1,710 | $621.74 | โ |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2022; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-12-28NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Nurse Practitioner - Family
Obstetrics & Gynecology
Nurse Practitioner - Family
Family Nurse Practitioner (Board Certified)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Internal Medicine (license number reported to NPPES: IL 036-081983)
NPI status registered as active in NPPES database
Registered at 4025 N WESTERN AVE, CHICAGO, IL 606183726 (Tel: 7732757700)
Registered at 2311 W 22ND ST, SUITE 202, OAK BROOK, IL 605231225
Recorded as MARIA IGNACIO, M.D.
Internal Medicine
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Chicago
- Dr. Sana Zuberi, MD
- Dr. Pius Ojemolon, MD
- Dr. Henry Danko, MD
- Dr. Shantala Sreerama, MD
- Dr. Andrew Tout, MD
- Dr. Babadele Oyedepo, MD
Mailing Address
2311 W 22nd St, Suite 202
Oak Brook, IL 605231225