Rank		N	Invalid	Ambiguous	Inconsistent
1	Oakland Southfield Physicians	954	1.99%	5.14%	1.78%
2	Corewell Health	16,577	0.13%	11.44%	0.25%
3	American Board of Osteopathic Medicine	12,922	0.02%	12.98%	0.11%
4	Ascension Health	15,515	2.07%	12.81%	1.13%
5	Trinity Health-Michigan	7,645	1.66%	11.81%	2.69%
6	Meridian Health Plan of Michigan	29,776	0.49%	18.30%	0.37%
7	Henry Ford Health System	17,443	0.49%	7.95%	11.62%
8	Tenet Health	11,795	3.37%	8.54%	8.88%
9	Centers for Medicare & Medicaid Services	18,749,854	1.31%	11.49%	16.17%
10	Prime Healthcare	6,994	2.70%	12.30%	19.63%
11	Molina Healthcare	522,167	2.45%	15.04%	17.38%
12	McLaren Health Care	3,660	2.38%	10.22%	24.62%
13	Blue Cross Complete of Michigan	88,021	1.33%	16.73%	22.73%
14	University of Michigan Sparrow	🚫

Key:

N - Number of Provider/Location or Practice/Location combinations represented in source data
Invalid - Address is not recognized by the USPS.
Ambiguous - Address is incomplete. Needs a suite number or other detail to be precise.
Inconsistent - Using different label to represent the same location, e.g. If 7 records show "101 N Main" and 3 show "101 North Main St", the majority (7) are considered canonical, and 3 out of 10 (30%) would show as "Inconsistent".
🚫 - Data source does not provide location information

Rank	N	Invalid	Wrong NPI type	Wrong NPI	Deactivated	No NPI	Chart
1	Corewell Health	10,515				0.30%
2	Ascension Health	13,017		0.05%		0.28%
3	Molina Healthcare	34,135	0.00%	0.02%	0.02%	0.38%
4	University of Michigan Sparrow	1,014		0.10%		0.49%
5	Tenet Health	10,017	0.01%	0.14%	0.01%	0.50%
6	Prime Healthcare	3,729	0.11%	0.38%		0.46%	0.03%
7	Blue Cross Complete of Michigan	37,112		0.78%	1.57%	0.29%
8	Centers for Medicare & Medicaid Services	9,726,865				3.62%
9	Trinity Health-Michigan	5,655	0.73%			0.19%	3.64%
10	McLaren Health Care	3,043	0.03%	0.16%		0.43%	19.13%
11	American Board of Osteopathic Medicine	🚫
12	Henry Ford Health System	🚫
13	Meridian Health Plan of Michigan	🚫
14	Oakland Southfield Physicians	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Centers for Medicare & Medicaid Services	11,417,013						✅
2	Blue Cross Complete of Michigan	43,378	2.11%	6.85%	0.27%	0.24%	0.40%
3	Oakland Southfield Physicians	917	0.87%	7.09%			2.18%
4	Tenet Health	13,111	0.87%	12.58%		0.05%	0.01%
5	University of Michigan Sparrow	954	0.21%	4.19%			11.64%
6	Corewell Health	19,774	4.95%	8.46%	1.52%	1.96%	1.34%
7	American Board of Osteopathic Medicine	16,545	5.34%	6.98%		0.01%	5.93%
8	Henry Ford Health System	11,265	2.49%	16.34%			1.17%
9	Trinity Health-Michigan	8,472	3.82%	13.30%	0.19%	0.08%	3.02%
10	Ascension Health	18,331	1.88%	9.43%	0.11%	0.04%	9.36%
11	Prime Healthcare	5,898	8.88%	11.83%	0.85%	0.07%	1.09%
12	McLaren Health Care	4,051	0.49%	12.10%			19.95%
13	Meridian Health Plan of Michigan	🚫
14	Molina Healthcare	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Corewell Health	6,786	1.53%	5.61%			10.73%
2	American Board of Osteopathic Medicine	12,922		4.42%			17.22%
3	Tenet Health	9,412	2.58%	7.84%	0.02%	0.01%	28.28%
4	Ascension Health	13,934	6.47%	3.30%	0.22%	0.60%	28.46%
5	Prime Healthcare	3,180	2.61%	6.13%	0.16%	0.16%	34.97%
6	Henry Ford Health System	10,677	11.56%	21.09%	0.02%	0.08%	12.20%
7	McLaren Health Care	2,509	3.27%	8.61%			41.25%
8	Blue Cross Complete of Michigan	🚫
9	Centers for Medicare & Medicaid Services	🚫
10	Meridian Health Plan of Michigan	🚫
11	Molina Healthcare	🚫
12	Oakland Southfield Physicians	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Trinity Health-Michigan	7,684	0.07%	1.93%
2	Prime Healthcare	394	33.50%	9.64%	1.27%	5.58%
3	Oakland Southfield Physicians	917	50.93%	2.94%
4	Tenet Health	1,725	45.39%	17.45%	0.17%	0.12%
5	Corewell Health	13,811	33.81%	31.42%	0.08%	0.09%	0.22%
6	McLaren Health Care	3,079	49.76%	16.73%	0.03%	0.03%	1.79%
7	American Board of Osteopathic Medicine	🚫
8	Ascension Health	🚫
9	Blue Cross Complete of Michigan	🚫
10	Centers for Medicare & Medicaid Services	🚫
11	Henry Ford Health System	🚫
12	Meridian Health Plan of Michigan	🚫
13	Molina Healthcare	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Redundant	Inconsistent	Unmapped
1	Corewell Health	2,832	0.07%
2	Henry Ford Health System	3,970		0.18%	0.25%
3	Tenet Health	2,110	0.38%		0.95%
4	Ascension Health	3,619	1.35%
5	McLaren Health Care	214	1.40%		0.47%
6	American Board of Osteopathic Medicine	🚫
7	Blue Cross Complete of Michigan	🚫
8	Centers for Medicare & Medicaid Services	🚫
9	Meridian Health Plan of Michigan	🚫
10	Molina Healthcare	🚫
11	Oakland Southfield Physicians	🚫
12	Prime Healthcare	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Chart
1	Henry Ford Health System	14,598	0.71%		19.72%
2	Tenet Health	16,007	7.25%		72.31%
3	Corewell Health	18,331		12.68%	70.32%
4	Prime Healthcare	20,442	0.94%	3.18%	86.00%
5	Ascension Health	28,553		0.00%	99.99%
6	American Board of Osteopathic Medicine	🚫
7	Blue Cross Complete of Michigan	🚫
8	Centers for Medicare & Medicaid Services	🚫
9	McLaren Health Care	🚫
10	Meridian Health Plan of Michigan	🚫
11	Molina Healthcare	🚫
12	Oakland Southfield Physicians	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	American Board of Osteopathic Medicine	17,947	0.10%				4.16%
2	Corewell Health	12,325	0.18%			0.29%	12.32%
3	Ascension Health	15,463	0.52%	2.43%	0.01%	0.03%	17.93%
4	Henry Ford Health System	11,311	0.74%	3.37%			18.06%
5	McLaren Health Care	2,195	9.70%	7.79%			54.40%
6	Blue Cross Complete of Michigan	🚫
7	Centers for Medicare & Medicaid Services	🚫
8	Meridian Health Plan of Michigan	🚫
9	Molina Healthcare	🚫
10	Oakland Southfield Physicians	🚫
11	Prime Healthcare	🚫
12	Tenet Health	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Chart
1	Corewell Health	10,694	0.17%	0.16%	82.91%
2	American Board of Osteopathic Medicine	🚫
3	Ascension Health	🚫
4	Blue Cross Complete of Michigan	🚫
5	Centers for Medicare & Medicaid Services	🚫
6	Henry Ford Health System	🚫
7	McLaren Health Care	🚫
8	Meridian Health Plan of Michigan	🚫
9	Molina Healthcare	🚫
10	Oakland Southfield Physicians	🚫
11	Prime Healthcare	🚫
12	Tenet Health	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Data supplied by Provider Harbor, current as of 2026-09-13.

Provider Directory Scorecards

Provider and Practice Location CMS National Provider Index (NPI) Specialty Medical School Practice Language Hospital Board Certification Residency