Rank		N	Invalid	Ambiguous	Inconsistent
1	Oakland Southfield Physicians	963	1.97%	4.98%	1.77%
2	Corewell Health	16,655	0.14%	11.53%	0.26%
3	American Board of Osteopathic Medicine	12,988	0.02%	12.98%	0.11%
4	Trinity Health-Michigan	7,742	1.68%	12.10%	2.88%
5	Ascension Health	15,453	2.05%	12.77%	2.04%
6	Meridian Health Plan of Michigan	29,776	0.49%	18.30%	0.37%
7	Henry Ford Health System	17,486	0.48%	8.01%	11.62%
8	Tenet Health	11,872	3.35%	8.59%	9.06%
9	Centers for Medicare & Medicaid Services	18,886,796	1.31%	11.47%	16.23%
10	Prime Healthcare	12,740	2.15%	12.96%	19.05%
11	Molina Healthcare	522,167	2.45%	15.04%	17.38%
12	McLaren Health Care	3,696	2.33%	10.15%	25.41%
13	Blue Cross Complete of Michigan	88,084	1.33%	16.74%	22.71%
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	10,598				0.30%
2	Ascension Health	12,946		0.05%		0.28%
3	Molina Healthcare	34,135	0.00%	0.02%	0.02%	0.38%
4	University of Michigan Sparrow	992		0.10%		0.50%
5	Tenet Health	10,094	0.01%	0.14%	0.01%	0.50%
6	Prime Healthcare	7,573	0.07%	0.29%		0.34%	0.01%
7	Blue Cross Complete of Michigan	37,140	0.00%	0.77%	1.56%	0.27%
8	Centers for Medicare & Medicaid Services	9,798,758				3.63%
9	Trinity Health-Michigan	5,675	0.72%			0.19%	3.59%
10	McLaren Health Care	3,069	0.03%	0.16%		0.39%	19.94%
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	11,498,061						✅
2	Meridian Health Plan of Michigan	23,843		3.07%			1.51%
3	Blue Cross Complete of Michigan	43,423	2.12%	6.85%	0.27%	0.24%	0.40%
4	Oakland Southfield Physicians	925	0.86%	6.92%			2.16%
5	Tenet Health	13,207	0.87%	11.09%		0.05%	0.01%
6	University of Michigan Sparrow	930	0.22%	3.55%			11.29%
7	Trinity Health-Michigan	8,166	3.09%	11.03%	0.01%	0.01%	3.85%
8	American Board of Osteopathic Medicine	16,623	5.34%	6.95%		0.01%	5.92%
9	Ascension Health	18,245	1.92%	8.13%	0.12%	0.04%	9.25%
10	Henry Ford Health System	11,314	2.51%	15.81%			1.18%
11	Prime Healthcare	11,597	7.33%	12.02%	0.53%	0.03%	1.87%
12	Corewell Health	21,684	4.79%	7.42%	1.40%	1.81%	10.15%
13	McLaren Health Care	4,084	0.91%	12.61%			13.81%
14	Molina Healthcare	45,299	0.45%	6.53%			24.37%

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Corewell Health	6,845	1.49%	5.65%			10.53%
2	American Board of Osteopathic Medicine	12,988		4.40%			17.27%
3	Tenet Health	9,487	2.54%	8.35%	0.02%	0.01%	26.73%
4	Ascension Health	13,834	6.48%	3.40%	0.22%	0.60%	27.40%
5	Prime Healthcare	6,444	3.17%	5.74%	0.40%	0.45%	31.08%
6	Henry Ford Health System	10,690	11.52%	20.92%	0.04%	0.07%	11.74%
7	McLaren Health Care	2,537	3.27%	8.40%			32.64%
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	7,773	0.06%	1.89%
2	Prime Healthcare	396	33.33%	9.60%	1.26%	5.56%
3	Oakland Southfield Physicians	925	50.92%	3.03%
4	Meridian Health Plan of Michigan	28,660	46.55%	13.06%	0.15%	0.31%
5	Tenet Health	1,725	45.39%	17.45%	0.17%	0.12%
6	Corewell Health	13,877	33.83%	31.35%	0.08%	0.09%	0.24%
7	McLaren Health Care	3,116	50.29%	16.46%	0.03%	0.03%	1.83%
8	American Board of Osteopathic Medicine	🚫
9	Ascension Health	🚫
10	Blue Cross Complete of Michigan	🚫
11	Centers for Medicare & Medicaid Services	🚫
12	Henry Ford Health System	🚫
13	Molina Healthcare	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Redundant	Inconsistent	Unmapped
1	Corewell Health	2,844	0.07%
2	Henry Ford Health System	3,997		0.18%	0.25%
3	Molina Healthcare	6,267	0.64%	0.34%	0.29%
4	Tenet Health	2,122	0.38%		0.94%
5	Ascension Health	3,609	1.33%
6	McLaren Health Care	216	1.39%		0.46%
7	American Board of Osteopathic Medicine	🚫
8	Blue Cross Complete of Michigan	🚫
9	Centers for Medicare & Medicaid Services	🚫
10	Meridian Health Plan of Michigan	🚫
11	Oakland Southfield Physicians	🚫
12	Prime Healthcare	🚫
13	Trinity Health-Michigan	🚫
14	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Chart
1	Henry Ford Health System	14,520	0.89%			18.31%
2	Molina Healthcare	24,055	1.81%	8.34%	0.39%	30.90%
3	Tenet Health	16,090	7.22%			72.45%
4	Corewell Health	18,485		12.77%		70.26%
5	Prime Healthcare	43,607	0.65%	1.71%	0.00%	88.83%
6	Ascension Health	27,222		0.00%		99.99%
7	American Board of Osteopathic Medicine	🚫
8	Blue Cross Complete of Michigan	🚫
9	Centers for Medicare & Medicaid Services	🚫
10	McLaren Health Care	🚫
11	Meridian Health Plan of Michigan	🚫
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	18,010	0.12%				0.87%
2	Corewell Health	12,392	0.18%			0.29%	12.24%
3	Molina Healthcare	8,621	3.58%			0.01%	13.90%
4	Ascension Health	15,359	0.52%	2.53%	0.01%	0.03%	17.82%
5	Henry Ford Health System	11,347	0.76%	3.41%			18.03%
6	McLaren Health Care	2,217	9.65%	7.76%			54.04%
7	Blue Cross Complete of Michigan	🚫
8	Centers for Medicare & Medicaid Services	🚫
9	Meridian Health Plan of Michigan	🚫
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	10,792	0.18%	0.16%	82.96%
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 2026-10-04.

Provider Directory Scorecards

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