Hatem Hassaballa
NPI 1699174540 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hatem Hassaballa is a Internal Medicine Physician provider in Chicago, IL (NPI 1699174540).
Provider details
- NPI number
- 1699174540
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036144048 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
281 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 236 | $173 |
| Critical Care, First 30-74 Minutes99291 | 45 | $203 |
Typical Medicare-allowed amounts for these services range $173–$203 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$107,270 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 840 S Wood St Fl 4Suite 409 (m/C 717)Chicago, IL 60612-4325Phone: (312) 996-7704Fax: (312) 996-8637
- 800 Biesterfield RdElk Grove Village, IL 60007-3361Phone: (224) 273-3152
- 20201 Crawford AveOlympia Fields, IL 60461-1010Phone: (708) 855-7297Fax: (708) 679-2161
Registry dates
- Enumerated
- 2014-08-16
- Last updated
- 2024-04-30
- Certified
- 2024-04-30
Frequently asked questions
- What is Hatem Hassaballa's NPI number?
- Hatem Hassaballa's National Provider Identifier (NPI) is 1699174540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hatem Hassaballa's specialty?
- Hatem Hassaballa is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hatem Hassaballa located?
- Hatem Hassaballa's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Hatem Hassaballa's phone number?
- The practice phone number listed in the NPPES registry for Hatem Hassaballa is (773) 702-5211.
- Does Hatem Hassaballa accept Medicare?
- Hatem Hassaballa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hatem Hassaballa's NPI active?
- Yes — Hatem Hassaballa's NPI (1699174540) is active in the NPPES registry as of the last update on 2024-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.